The Advancement of Baekje in the Maritime Kingdom-Phoongle

 1. Introduction The theory that Baekje entered China and held overseas territories has been acknowledged by many scholars since the late Joseon Dynasty.In addition, it is recorded as true in the current national history textbook.Given that it is described as a well-established theory in textbooks, it can be said that Baekje's entry into China is a fait accompli that no longer needs to be controversial.   However, some scholars take a more cautious view of this issue.Opinions denying the theory of entering China itself have also been raised in domestic and foreign academia since the late Joseon Dynasty.They argue that it is difficult to believe the records of the Southern Dynasties of China, citing that it is impossible mainly because Baekje and China were geographically disconnected and that the Yoseo region at that time was occupied by a powerful nomadic nation.   Of course, even if there is related data, it cannot be immediately recognized as a historical fact.The historical value of feed must be secured through strict feed criticism.In this respect, the distrust of Baekje's theory of advancing to China can be of certain significance.However, existing research is more likely to be viewed from the preconceived notion that it is impossible in the geographical and international situation at the time than strict historical criticism.In that respect, the existing distrust theory should be criticized.In addition, it is necessary to examine whether it is reliable through strict feed criticism of related feed.   Under this awareness of the problem, I would like to study the theory of Baekje's entry into China as follows.First of all, Chapter 2 will prove that it is necessary to review historical materials related to Baekje's theory of distrust in China.Chapter 3 examines the possibility of Baekje's entry into China through the review of related historical data.Finally, in Chapter 4, I intend to develop my own argument about the timing, duration, and location of Baekje's entry into China.   My research is thought to have many deficiencies.Various criticisms will be needed for further intensified research in the future. 2. Criticism of Baekje's view of denying its entry into China 1) The reason why there is no record in the History of the Three Kingdoms, the Book of Northern Dynasties, and Jinseo is distrustful of Baekje's entry into China.   First of all, let's look at the claim that Baekje distrusts its entry into China because related historical materials are not handed down in the History of the Three Kingdoms.Compared to the main period of Silla, the Baekje period of the Samguk Sagi has a very small amount of historical materials and there are many problems to be solved in order to secure historical value.In other words, it is difficult to expect that all the main facts of Baekje's foreign relations are recorded in the main period of Baekje as a librarian whose both quantity and quality are insufficient.However, it is problematic that Baekje's entry into China is not recorded because it is important.   However, it is highly likely that Kim Bu-sik, a proponent, deleted facts favorable to Baekje and Goguryeo because he had a Silla-centered officer.The editors of the History of the Three Kingdoms would have clearly seen Songseo, Yangseo, Namsa, and Tongjeon about the advancement of Yoseo, but they did not appear at all in the Baekje period.This may have originated from the nature of this flag itself, but this flag must have a clear knowledge of the timing of abnormal events, which is a chronicle, and it may be because there was no clear period of entry in Songseo.However, the fact that related facts are not revealed in 등 shows the possibility of intentional omission.For example, in the Baekje Dynasty of the Geography of the Three Kingdoms, the article of Tongjeon about the location of Baekje is cited, and the summary and the article on the territory of Jinpyeong right in front of the article are ignored.   Considering these points, the fact that it is not conveyed in the History of the Three Kingdoms cannot be the basis for denying Baekje's entry into China.   Next, let's look at the argument that it is difficult to believe because it is not delivered unilaterally only to the librarian of the Southern Dynasties and not to the librarian of the Northern Dynasties.In order to get an answer to this, it is necessary to know which of the Southern and Northern Dynasties maintained a closer relationship with Baekje and was well aware of Baekje's situation.And if Baekje had actually advanced to China and both sides knew this fact, it should be considered which side would have been more interested and recorded.   Baekje paid tribute to Dongjin in 372, and since the king of Baekje received Dongjin's attention, he has maintained a close relationship with the South Korean side.In Songdae alone, the number of envoys from both countries has reached 12.On the other hand, when it comes to the relationship with the Northern Wei of the Northern Dynasties, only the dispatch of envoys by the Baekje side was seen once in 472.Therefore, it is reasonable to say that the knowledge of Baekje that was obtained from the North Korean side was insignificant compared to the knowledge gained through continuous and ordinary exchanges from the South Korean side.In addition, even if the North Korean side knew that Baekje had advanced to China in the past, there would have been no reason to write it down if Baekje's power did not exist at the time.In addition, if Baekje's forces, which were advancing at the time, occupied part of the coastal region where the Northern Dynasties were difficult to reach and were at odds with Goguryeo, this would not have been recorded.On the other hand, the Southern Dynasties, who have considerable knowledge of Baekje, would have clearly recorded if they knew that Baekje had defeated its adversaries instead and entered the field.In addition, if there was an area of Baekje in the southern part of the country, it is possible that Baekje's advance to Yoseo was noted to offset this.This is very likely in connection with the fact that Jinpyeong-hyeon was in Gwangju throughout Jin, Song, and Je.Let's take a closer look at this later.   Next, let's think about why the fact of entry is not recorded in Jinseo, which tells the history of the Qin Dynasty that there was advancement.   The current Jinseo was reorganized again during the reign of King Taejong of the Tang Dynasty, and it is said that the "Jinseo" of Sim Yak, a proponent of Songseo, disappeared.In other words, it can be seen that the current Jinseo was incomplete when compiling it.In addition, "Jinseo" contains Buyeo Gukjeon, Hanjeon, and Jinjeon, but Baekjejeon and Goguryeojeon are missing.The fact that such incomplete data, Jinseo, does not contain the fact of entry cannot be the basis for entry. 2)On the other hand, let's look at the claim that Baekje's entry into China is not recognized as true because the place names of Jinpyeong-gun, Jinpyeong-hyeon, and Baekje-gun that Baekje established are not found anywhere else in China.This can be denied because the place name Jinpyeong-hyeon appears in Jinseo, Songseo, and Namjeseo.This is because he tried to find the name Jinpyeong near the Yoseo area only thinking about the existing Yoseo-gun.However, in addition to the Yoseo area, there has been a theory that Baekje had advanced to China's Hwabuk, Shandong, and Yangtze River basins.Accordingly, it can be seen that Changohyeon, the present-day Jangjok autonomous district of Gwangseo-seong, was Jinpyeong-hyeon in the old days of Jin, Song, and Je.Let's take a closer look at this later.   Also, let's look at the fact that Baekje and China are too far away to advance into Baekje.It seems that the central and southern powers of the Korean Peninsula sought direct negotiations with the Liaodong region, and in the second half of the fourth century, Baekje dispatched envoys to Dongjin at the mouth of Yangtze River.In addition, Baekje in the 6th century used a route to Southeast Asia.Given the activities of Baekje, the fact that the distance is far cannot be the basis for denial.   It is not convincing to argue that the situation in Baekje would not have had enough room or ability to send troops overseas.Baekje was expanding rapidly, with King Geunchogo fully integrating Mahan, and was the strongest country on the Korean Peninsula in the second half of the fourth century, with Goguryeo's King Won being killed in the Battle of Pyongyang Castle in 371.This situation was able to encourage Baekje's overseas expansion.   Next, let's look at the argument that the Yoseo area in the 4th and 5th centuries was not a power vacuum enough for Baekje to advance and establish and maintain the military, so advancement cannot be established.In the first half of the 4th century, the Yoseo area was dominated by Mo Yong's front, the second half by Jeon Jin and Hu Yeon, and in the 5th century by Bukyeon and Bukwi, respectively.They were powerful as nomadic nations that commanded North Korea and China.It is certainly difficult in general theory that Baekje has its own territory in the area where they were.However, even though they were powerful nomadic nations, in 338, the former and the latter were attacked by the latter and pushed to the brink of national survival.Of course, most of these conflicts ended immediately, but even for a short period of time, there were several partial power gaps.In addition, nomadic countries were powerful, but their direction of entry was mainly the midfield and not the fluctuating area.Their appearance in Liaodong was to keep Goguryeo in check.Their path was usually from the middle and upper reaches of Yoha to the sacred direction of Goguryeo, but they did not pass through the Yoseo Coast.In other words, it is possible that the Yoseo Coast, which has a long coastline, was a blank area for nomadic peoples who are weak in Susan.   Let's look at the argument that it is difficult to believe the theory of Yoseo advancement because archaeological relics and relics are not found.There are many possibilities that archaeological relics and relics have not been found.If Baekje's entry into the Yoseo was very short-term or the area was very narrow, it is very difficult to find relics and relics.In addition, it is a fact that Chinese culture is higher than Baekje's, and it is difficult for low-culture Baekje relics and relics to remain.In addition, it is also very difficult to expect that the Yoseo and Yodong areas have historically changed, and the relics and relics of all the forces that occupied the area remain.In the end, the discovery of archaeological evidence cannot be an absolute criterion for determining the authenticity of advancement.   So far, we have looked at logical loopholes that may have views to deny China's advancement based on the general trend theory.The subject of entry into Baekje in Yangjikgongdo will be examined in detail in the next chapter.Now, let's look at the possibility through a review of historical materials that directly or indirectly indicate Baekje's entry into China.    3. Review of related historical materials 1) The summary of China's Namjogye librarian, and the historical records of the territory of Jinpyeong, first of all, tell us that Baekje occupied the Yoseo and Jinpyeong areas.     Baekje Kingdom is originally located in Cheonyeo-ri, east of Liaodong, along with Goguryeo.After that, when Goguryeo took possession of Liaodong, Baekje took possession of Yoseo.Baekje's reign was called Jinpyeong-hyeon, Jinpyeong-gun.

<Songseo> The kingdom of Baekje Byeonjin woke up during the Qin Dynasty and received a memorial service and put Baekje army on its own, but it was in the northeast of Goguryeo. Namjeseo Baekje was originally a member of Mahan's tribe.When Goguryeo occupied Liaodong at the end of the Qin Dynasty, Nakrang also occupied Yoseo Jinpyeonghyeon. <Yangjikgongdo> The country (Baekje) is originally located in the same clan in Liaodong along with Goguryeo.When Goguryeo occupied Liaodong during the Qin Dynasty, Baekje also occupied Yoseo Jinpyeong 2nd Army and established Baekje Army on its own. <Yangseo> The country (Baekje) is originally located in Cheonyeo-ri, east of Liaodong, along with Goguryeo.When Goguryeo occupied Liaodong during the Qin Dynasty, Baekje also occupied Yoseo Jinpyeong 2nd Army and established Baekje Army on its own. <Namsa> When Goguryeo occupied Liaodong during the Qin Dynasty, Baekje also occupied Yoseo Jinpyeong. <Munhak Tongo> It was called Baekje because Baekga crossed the sea at first.When Goguryeo occupied Liaodong during the Qin Dynasty, Baekje also occupied the 2nd army of Yoseo Jinpyeong (now between Yuseong and Bukpyeong).   There are some differences in the wording of historical materials above <Electricity>, but they are roughly the same.In other words, it directly reveals that Baekje occupied Yoseo and Jinpyeong in China's Qin Dynasty and established Jinpyeong County as the governing body.And it can be seen that Baekje's entry into the Yoseo and Jinpyeong regions is closely related to Goguryeo's occupation of Liaodong.   First of all, the contents of the Baekje Kingdom of Songseo are all diplomatic records of the time, but only the records of the territory of Yoseo and Jinpyeong seem to have had to record the facts of the time as records of the past.   The following is the contents of Baekje's "Namjeseo" supplemented by "Health Annals."Like Baekje's Songseo, most of them are related to China and there is no change in composition.However, Jinpyeong-gun and Jinpyeong-hyeon of Baekje in Songseo have been changed to Baekje-gun. The Baekje Shrine Shinto Sutra of Yangjikgongdo, along with Baekje's envoys, records articles on Baekje's origin, Yoseoyeongyu, popular relations, and cultural relations, and the subject of Yoseo and Jinpyeong Yeongyu is recorded as Nakrang.This raises the need to understand the relationship between Nakrang and Baekje at that time.In addition, it is evaluated as a decisive data of the period of Yoseo and Jinpyeong's reign as the only true words to point out the period of Yoseo and Jinpyeong's reign. Yangseo Baekjeo, Namsa Baekjeo, Literature Notice Baekjeo, and Tongjeon Baekjeo were only following the previous librarians.Among them, the fact that the location of Yoseo and Jinpyeong was recorded as "今北北平'" in Baekje of "Tongjeon" is worth referring to for the location.This will be examined while examining the location of Yoseo and Jinpyeong-gun. The contents of Songseo Baekjejang and Namjeseo Baekjejo are all librarians who recorded only the facts based on diplomatic data from Songdae and Namjedae.Therefore, it seems that Yoseo and Jinpyeong were also influenced by diplomatic data.The period of ownership does not appear in the manufacturing of Songseo, where Baekje's possession of Yoseo and Jinpyeong was recorded for the first.Since then, all articles have shown the period of infancy called Jindae.Here we can think of some possibilities.It is possible that he knew about Yoseo and Jinpyeong's childhood when Songseo was written.In addition, it is possible that an article called Jindae was inserted based on Goguryeo's occupation of Liaodong, although it was not known when Songseo was written about the period of possession.In addition, it is possible that the librarians inserted it after not recording it, although they already knew about it in Songdae.In any case, the article "Jindae" is too vague and broad.As such, it can be seen that it is not a record that can determine the period of ownership. In Yangjikgongdo, the subject of Yoseo Yeongyu is Nakrang, not Baekje.However, this record is a record of facts about the Baekje Kingdom, but I do not understand why Nakrang wrote that he owned Yoseo.Nakrang was extinguished by Goguryeo in the first half of the 4th century, and only a part of it returned to Mo Yong.However, it is interpreted that Song Seo-chan, who encountered Baekje's claim of sovereignty over Nakrang and Daebang in the late 5th century, mistook the fact that Nakrang-gun in the northwest of the Korean Peninsula returned to Mo Yong in the Yoseo region as related to Baekje entered Yoseo.However, in Yangjikgongdo, it is very suspicious whether it is possible to write that Nakrang possessed Yoseo, which was returned.   In response, this sentence of Yangjikgongdo can be interpreted anew.In other words, it is interpreted as an object occupied by Goguryeo along with fluctuations by reading it in space, and the subject that occupied Yoseo and Jinpyeonghyeon is Baekje, the subject of the entire sentence.However, compared to other librarians, Nakrang appears to have been written on behalf of Baekje, and the interpretation is smooth only when Nakrang is the subject of literature.   What is important here is the article about the childhood of Yangjikgongdo.In addition, in Yangjikgongdo, the subject of Yoseo Yeongyu was called Nakrang.However, later librarians following "Jinse" and "Baekje" instead of "Truth" and "Nakrang" of Yangjikgongdo raises doubts about the credibility of Yangjikgongdo.In that respect, it seems that the reason why Nakrang knight is recorded in the envoys of Baekje Kingdom is because of the confusion of ideas about Baekje and Nakrang.Therefore, it can be thought that the proponent of Yangjikgongdo thought it was okay to use Nakrang as another expression of Baekje, or that it was identified that it was the same as Baekje.Only if you think this way can you explain what Nakrang is written in Baekje's article. 2)Following the article on Baekje's advancement of Yoseo, let's look at historical sources indirectly showing that Baekje has entered the Yoseo area.    All the people of Goguryeo, Baekje, and Umundan were different from China as a group of soldiers. <Jinseo> Buyeo was in Noksan Mountain, but the village collapsed due to Baekje's invasion. The historical materials above the "Self-Governing Governor" are related to the whole relationship of Mo Yong of the Seonbi tribe, which was located throughout Liaodong and Yoseo in the first half of the 4th century.However, Baekje appears in the content.It indirectly reveals that Baekje was active in these regions.   First of all, the "Jinseo" Moyonghwangjeon Hall was included in an appeal filed by Bongyu, a veteran of the Korean War, to King Mo Yonghwang in 345, urging reform of the city government, referring to mention the prisoners captured by the Korean War from the late 330s to the early 340s.However, here, the prisoners of Baekje, along with the prisoners of the three countries around the front, including Goguryeo, Umunbu, and Danbu, are being mentioned.This can be said to mean that Baekje had a military conflict with Jeon Yeon before 345.The motive for the conflict is unknown, but if the historical value of this record itself that the Baekje people were completely captured, there was no choice but to admit that there was a military conflict.   Next, it is said that Baekje invaded Buyeo, which was located in Noksan before 346, and destroyed the village, and eventually moved the Buyeo forces to the west close to the front edge.It can be seen that this is periodically related to the 345 years of the "Jinseo" Moyong Hwangjeon.There is no doubt that Buyeo was currently located in the northern part of Goguryeo.In addition, it can be inferred from the article itself that Buyeo moved from its headquarters to the vicinity of the front edge of Yoseo in the west after being attacked by Baekje that Noksan Mountain was located in some part of northeastern China.   In short, the war between Baekje and Jeonyeon, Baekje and Buyeo proves that Baekje had entered the Yoseo region in some form in the first half of the 4th century. There are the following records supporting this advancement.    If you pull Goguryeo Baekje to the east with five Hwans and scholars to the north, there are more than 500,000 armed soldiers.    The above historical data recommended that Haengdang Gongrak, a Confucian scholar in Jeonjin in 380 years, be revolted, and wrote that if he pulled Goguryeo and Baekje to the east with five hwan and scholars, there would be more than 500,000 armed soldiers.If Baekje's territory was limited to the southwestern part of the Korean Peninsula, it would have been difficult to attract Baekje, which had been geographically disconnected, to the rebellion.If there is no possibility of attracting Baekje power, it is difficult to talk about this.At least, it can be seen that there was a good chance that Baekje's forces could intervene in the region.Therefore, this is also a historical material that can prove Baekje's advance to Yoseo.There is also a record as follows.    While we're performing...The country (mulgil) secretly conspired with Baekje first, dug up 10 villages of Goguryeo along the waterway, and joined forces to take them away. <Wiseo> The above historical materials were said by Eulryukji of Mulgil between 471-475, and it is recorded that the Mulgil secretly united with Baekje to take 10 villages of Goguryeo along the Mulgil (sea road).However, according to the records, it is true that the waterway had the intention to conspire with Baekje to attack Goguryeo, but this did not happen.However, the fact that the waterway downstream of the Songhwagang River tried to unite with Baekje at this time shows the possibility that Baekje was located in an easy place to unite with the waterway.In other words, it proves that Baekje was active in the Yoseo area. 3)Following the engagement between the Northern Wei and Baekje, let's take a look at the articles that recorded the war between the Northern Wei and Baekje.     The Wei army attacked us and we defeated them. At the time of "Three Kingdoms Sagi", the Orangae of the Wei Dynasty attacked Baekje with hundreds of thousands of cavalry.Modae (King Dongseong) sent Chansuryu Haeryegon Mokgana, the name of the longevity judicial system, to lead the soldiers and beat the Orangkae army greatly. "Namjeseo" When the Wei Dynasty sent troops to attack Baekje, Baekje defeated them. In the second year of King Yeongmyeong's reign, the Orangkae of the Wei Dynasty conquered Baekje and greatly defeated Modo (King Dongseong).

The historical records above "Health Annals" tell of the war against the stomach in the late 5th century when Baekje was King Dongseong.Consolation is generally regarded as an derogatory term for the Northern Wei.In contrast to each article, it is said that the 10th year of King Samguksagi, the 10th year of King Namjeseo, the 6th year of King Yeongmyeong, the 6th year of King Yeongmyeong, the 6th year of King Seong, the period of war is different.Anyway, if you believe these articles, it means that the Northern Wei invaded Baekje several times in the late 5th century.In a situation where Goguryeo and the West Sea are separated, this article may be either the Northern Wei passed through Goguryeo's territory or crossed the sea.However, there is little possibility that Goguryeo passed through the Northern Wei army, and it is difficult to say that the Northern Wei, a nomadic dynasty, crossed the sea.In addition, there is little possibility of an attack across the sea because there is a record of Baekje's attack with cavalry.   It is argued that the area of Baekje where the Northern Wei invaded must have been Baekje's army installed on the mainland of China.This is the most reasonable conclusion that can be obtained when analyzing the above feedstuffs.Accordingly, it is considered that Yoseo and Jinpyeong-gun installed in Jindae remained until the late 5th century and were invaded by the Northern Wei, or that Baekje-gun was installed in a separate area from Yoseo region and existed until the end of the 5th century.However, the background and motive of the battle are not known at all, and it is not known where Baekje's territory in China was invaded by the Northern Wei.In addition, there is no record at all in Wiseo, a librarian of the Northern Wei, who is involved in the war with Baekje.However, it is said that Wiseo, the editor of Wiseo, is a frivolous person who receives bribes and distorts facts, and calls Wiseo a dirty history.In addition, the existing "Wisho" is a collection of 29 original works, and Song Dynasty's wills and Beomjo-woos were corrected.Therefore, it is difficult to expect all records to be kept perfectly. 4)Following the article on Baekje's territory, let's look at the article on Baekje's territory, which indicates that Baekje has entered China.     When Goguryeo Baekje was in its heyday, 1 million strong soldiers invaded Owol in the south and Yoo Yeon-Jeno in the north, making it a headache for China. In a chapter posted by Choi Chi-won to Taesajung, the above historical records argue that Goguryeo and Baekje invaded the mouth of Yangjagang in the south to the east coast of Yu, Yeon, Je, and Noh in the north during their heyday.It is not known how obvious Choi Chi-won's perception came from, but at that time, Choi Chi-won, as China's current president, could not have said false information about China's territory.If you accept the contents of the article as it is, you can guess that Baekje had an area on the east coast of China.     Baekje is a different kind of Buyeo...It is bordered by Wolju to the west, Wa to the south, and Goguryeo to the north, all crossing the sea.The east side is Silla. <Sindangseo> Baekje is a different kind of Buyeo...To the north of the great sea is to the south of the small sea.It is Silla to the northeast, Wolju to the west, Japan to the south, and Goguryeo to the north. The historical materials above "Gudangseo" have only differences in wording, and the content is that Baekje's territory crosses the sea to the west, Wolju, China to the south, Why, and Goguryeo to the north, and Silla is bordered by land.In interpretation, this article shows that Wolju, Why, and Goguryeo cross the sea and Silla is in contact with land, and when Baekje is in the southwest of the Korean Peninsula, Wolju and Why can only be accessed through the sea, but Goguryeo can be called "Northern High."Therefore, the term "North Sea High School" suggests that Baekje was facing the fluctuations of Goguryeo in the Yoseo area.In addition, there is an area of Baekje in Wolju and Why, so it can be assumed that it was in contact with the area. 5)Lastly, let's look at the article about the fall of Baekje and the division of territory, and the article that Baekje collapsed and Silla and Balhae shared the territory.     The old land was taken by Silla, and the remaining groups near the castle were gradually scattered and subjugated by stone palaces and horses.The king, Bu Bu-sung, did not dare to return to his home country and was deprived of his territory by the Silla Malgal, and Buyeo's military funeral was finally over. <Tongjeon> It is written that the Buyeo clan was finally extinguished as Baekje was destroyed by Silla, the rest of the groups near the castle were dispersed into stone palaces and horses, and the sovereign Buyeo Sungdo land was buried in Silla and horses.This historical material forms a certain force until the fall of Baekje and shows that Baekje people lived in China, and it can be seen that the land was divided into Silla and Malgal.In other words, until 660, when Baekje collapsed, Baekje forces in China maintained their power, but were destroyed by the fall of Baekje, and by Silla and Balhae (Malgal), the mainland of Baekje was divided into Silla and Balhae.      In the late Baekje period, Balhae Malgal and Silla divided the land of Baekje. <Three Kingdoms> Your grandson (the grandson of King Euija) is...The land was divided into Silla and Balhae Malgal.Baekje's bell is finally over. The historical records above "Gudangseo" show that Silla and Balhae Malgal shared Baekje's land in the late Baekje period, and that Silla occupied the Yoseo area of the Baekje mainland on the Korean Peninsula.Looking at the above articles, there is a 20-30-year gap between the fall of Baekje and the founding of Balhae, so it is not understandable.However, the article of Baekje in "Gudangseo" is related to the progress of King Uija's grandson, which explains that Baekje residents in the Yoseo region maintained their power to some extent even after the fall of Baekje and belonged to Balhae over time.   As discussed above, it can be seen that the historical materials that directly or indirectly represent Baekje's entry into China are very diverse and appear over a long period of time, including entry, activity, and destruction.The fact that historical materials are widely appearing mainly in Chinese literature cannot be doubted that there was a clear advancement of Baekje people regardless of the nature of Baekje's entry into China.Then, in the next chapter, let's consider the timing, duration, and location of the military, which is said to have been installed by Baekje. 4. Reviewing the timing and location of the establishment of Jinpyeong-gun. In this chapter, let's consider the timing and duration of the establishment of the military that Baekje had established in China. 1)The timing and duration of entry First, the views of existing researchers on the timing of entry are as follows.Kim Se-ik, Lee Myung-kyu, and Jeong In-bo are considered to have advanced in the late 3rd century, from the early 2nd century to around 370s, Bang Sun-ju 360-370s, Shin Chae-ho, Kim Sang-ki, Jeong Sang-soo, and Kim Cheol-joon in the early 5th century.The fundamental reason why these various views have been raised is that the time recorded in the librarian book is true or true.The period of Seojin and Dongjin is 155 years in 265-420, and since no specific period is mentioned during this period, various views have been presented according to their arguments.So, how should we pursue the timing of our entry into China?First of all, I think the following prerequisites are necessary.   First of all, it should be considered that Baekje's advancement into Yoseo is timely related to Goguryeo's advance into Liaodong.Second, the situation within Baekje and the international situation should be considered.Third, it can be seen that China has also entered the Southern and Northern Dynasties regions, so the timing should be considered by linking them to the Southern and Northern Dynasties.Then, let's consider the timing in consideration of these matters.   Baekje's summary and the timing of Jinpyeong's entry are said to be Jindae.However, Yangjikgongdo specifically states that it is true.The record of truth can be considered in the process of estimating the timing, but it cannot be seen absolutely.This is because it is the only record that comes out and the subject is Nakrang.It seems that the concept is unclear, such as Chanja confusing Baekje and Nakrang.In addition, the librarians since then did not follow this.This sufficiently implies that the record of truth does not come from a clear basis.And I don't know what Seojin means or Dongjin means.   Therefore, I think that more weight should be placed on the record of Jindae.This is because it seems to be a very meaningful record.This is because it can be seen that the timing of entry could not be clearly written.In other words, if the advancement was not made at once, but continued throughout the period, it is natural that the record is called Jindae.The period of Goguryeo's advance to Liaodong can be seen as the early 4th century, the early days of its defeat.The reason is that Baekje's summary and records of its advance to Jinpyeong do not tell the clear and firm advancement of Goguryeo.It is only a record to explain when and background of Baekje's entry into Yoseo and Jinpyeong.Here, the following records are noteworthy.     Jinpyeong was established during the Qin Dynasty and belongs to Woollim-gun, Gwangju, passed Namsong Namje, and is now located on the border of Gwangseoseong. This is from Yoo Gyun-in's 1980 version of the Chinese History Geographical Dictionary 2, and the contents are that Jinpyeong-hyeon was established during the Qin Dynasty and belonged to Woollim-gun, Gwangju, and continued to Namsong Namje, and is the boundary of Gwangseoseong (Changohyeon, Gwangseo Autonomous Region).In addition, the following records can be seen in Gwangjujo, the main district of Songseo.     Gwangju...Woollim Taesu... Jinpyeongryeong was called Jangpyeong during the Oh Dynasty, but changed its name to Jinpyeong in the year of Jin Mujetaegangwon.

<Songseo> This is a record that Jinpyeong-hyeon in Woollim-gun, Gwangju, was called Jangpyeong during the Oh Dynasty and changed its name to Jinpyeong in the year of King Mujetaegangwon (280).The name of Jinpyeong-hyeon is also shown in Jinseo and Namjeseo.In other words, it is consistent with the previous records of the History of China.According to such records, if Jinpyeong-hyeon, the only Chinese librarian, is Jinpyeong-hyeon, Jinpyeong-gun, who was said to have advanced to Baekje, the period of advancement will rise by 280 years, the early days of Seojin.In other words, whatever the nature of Baekje's advancement, it can be said that it was in the early days of Seojin that established a bridgehead for advancing to China.There is only a 30 year difference from 311 years, the first period of Goguryeo's turbulent advancement.In addition, 280 was the year when the Oh Dynasty was destroyed by the Qin and became unified.Changohyeon, where Jinpyeong-hyeon was currently located, is located near northern Vietnam near the east coast of China.It can be said that Baekje is very likely to have occupied the bridgehead of entering the transition period of Chinese reunification in this remote area and this area close to the sea.At that time, Baekje was known to have established Baekje's national system during the reign of King Goi.Baekje was a country that extended to the sea as much as the Chinese thought that Baekje was ruled by the Baek family.Then, let's make up for Baekje's ability to engage in maritime activities later.   Next, let's look at the duration of Baekje's military.Existing studies have shown that Kim Se-ik temporarily existed until the early and mid-6th century, Kim Sang-ki until the end of the 5th century, Lee Myung-kyu until the end of the 5th century, Shin Chae-ho until the end of the 4th century, and Jeong Sang-soo in the 370s.Various views have also been discussed on the duration, but it can be pointed out that the problems of existing research were viewed only in terms of military and political aspects.When Baekje's advancement was said to have been aimed at commercial maritime trade, the inter-Korean and its unification dynasties, Su and Dang, may have needed Baekje's commercial capabilities.Baekje, the third party, was the most suitable force for the exchange of goods during the inter-Korean Dynasty, so the unification dynasty, Su, may have built a grand canal to use inland waterways, not the sea.   In any case, it is believed that Baekje's advancement has been relatively long because Yoseo and Jinpyeong, located on the outskirts of China, did not pose a significant threat to China and rather gained commercial benefits.Of course, the military character may have weakened with the unification of Sui, but the next record shows that Baekje's power lasted for a long time only after the fall of Baekje by Silla and the Party.     The old land was taken by Silla, and the remaining groups near the castle were gradually scattered and subjugated by stone palaces and horses.The king, Bu Bu-sung, did not dare to return to his home country and was deprived of his territory by the Silla Malgal, and Buyeo's military funeral was finally over. <Tongjeon> 2) Yoseo and Jinpyeong-gun's location Next, let's look at the locations of Yoseo-gun and Jinpyeong-gun, where Baekje entered China.Until now, there have been no various views on this issue.In other words, since the names of Jinpyeong-gun or Jinpyeong-hyeon do not appear in any Chinese librarian (of course, this was a wrong idea), Yoseo and nearby areas have been considered Yoseo and Jinpyeong.In addition, Jeong In-bo and Kim Se-ik confirmed the location of the party's Yuseong-gun and Bukpyeong-gun, which were recorded in Tongjeon, and claimed that Jeong In-bo was an area covering Daenyeong abandoned fortress, Neungwon, and Joyang, and that Kim Se-ik is an area from downstream of Daeneung and Soseong.However, the Seju of "Tongjeon" was not written knowing exactly about the Gunhyeon installation area.In other words, the Five-Hwanjo of "Tongjeon" has a seju named 今郡郡 for Yoseo and 今平郡 for 平平.This indicates that Duu, a proponent of Tongjeon, recognized Jinpyeong-gun and Ubukpyeong-gun as the same place names.In other words, it can be said that Duu was misled by the similarity of the names of Jinpyeong-gun and Ubukpyeong-gun, and attached an unfounded Seju.   Yoseo, where is Jinpyeong-gun located?Yoseo is the western part of Yodong, bordering Yoha.Since this name corresponds to Goguryeo's fluctuations, it must have existed along the coast of the long Yoseo region.Then, Jin Ping will look back at the previous record.    Jinpyeong was established during the Qin Dynasty and belongs to Woollim-gun, Gwangju, passed Namsong Namje, and is now located on the border of Gwangseoseong. <Chinese Historical Geographical Names Dictionary>, that is, Changohyeon, Gwangseo Zhangjia Autonomous Region, the boundary of the current Guangxi Province.Let's look at the following records here.    Baekje is located in 180-ri northwest of Guangdong Heumhyeon.There is a permit, but it is the boundary between the five systems. <Chinese Historical Geographical Names Dictionary> This is from the previous <Chinese Historical Geographical Names Dictionary>, and Baekje (name of place name) has Heo (a city centered on a castle in the past) in 180 ri northwest of Guangdong Heumhyeon, and it is the boundary of Oh and Gye 2.This area is also close to Changohyeon, Gwangseojangjok Autonomous Region.In the list of data from the administrative districts of Gwangseo Jangjok Autonomous Region, the place name Baekjehyang is shown, and Baekje permission is recorded there.Let's look at the record.     Daebakjeae This content is that Baekjeheo, the central village of Baekje in the Gwangseojang Autonomous Region, is called Daebakcae, the native pronunciation, not Ppaijixui, the original Chinese pronunciation.In other words, it becomes Daebaekje in our pronunciation.The fact that the natives call the village in Korean pronunciation can be a clear evidence that the Baekje people lived here.   In short, the names of Jinpyeong-hyeon appear in the history books of Jin, Song, and Je, which are said to have entered China, and the fact that the area is not far from the current east coast of China and northern Vietnam strongly suggests that Baekje established Jinpyeong-gun in this area.So, is there any evidence that Baekje interacted with the region?There is a record as follows.     The ancestor of the black teeth was Buyeo, but it was sealed with black teeth, and black teeth were used as last names. The above historical data says that Heukchi was originally Buyeo, a royal family of Baekje, but it was sealed in the Heukji region and the name Heukchi was used as a seed.This is a record that Baekje ruled the Heukji area, but the name of Heukchi is not found in the names of counties and prefectures in Baekje area known so far.However, although it is a much later data, it is referenced that the record of Japan is left in the "Gieon," written by Heo Mok in the late Joseon Dynasty, called the Heukchiyeoljeon.According to the report, Japanese call Japan "black tooth" because they paint their teeth black. On the other hand, it is said that Blackfish was designated as a member of the Philippines and officials were dispatched and presided over as a port of call on the southern route.     Those people (Baekjein) are complicatedly mixed with Silla, Goguryeo, and Japanese, and there are also Chinese people. <Buksa> This record shows the internationality of the composition of Baekje people because Baekje people are a complex mixture of Silla, Goguryeo, and Japanese, and there are also Chinese people.     Baekje...He gave his father's wealth and two servants to the Japanese. This record of "The Book of Japan" shows that Baekje gave two articles of wealth and slaves from Bunam, Cambodia, to Why in 543.This is a record showing that Baekje traded to Cambodia at that time.     Im-eup, the father of Baekje, sent envoys together and offered Bangmul (to both countries). <Yangseo> This record shows that Baekje, Bunam, and Im-eup paid tribute to sheep together, and Baekje's annual tribute with Cambodia (Bunam) and southern Vietnam (Imeup) was in close contact with the region.     If you go to the southern sea route for three months, there is Tammora-guk, which is 1,000-ri in the north and south and hundreds of ri in the east and west, but it is a native product with a lot of roe deer and deer and attached to Baekje. <Suseo> If you take the southern sea route for three months, there is Tammoraguk, which is 1,000-ri in the north and south and hundreds of ri in the east and west, but it is a native product of roe deer, deer, and it is attached to Baekje. The historical records above <Nuksa> show that Baekje had a country far enough to travel three months on the sea road to the south, and that the country had 1,000-ri in the north and hundreds of miles in the native products were roe deer and deer, and it was attached to Baekje. 5. Conclusion So far, I have discussed various discussions in my own way regarding Baekje's entry into China.First of all, Chapter 2 pointed out the loopholes and irrationalities of distrust through criticism of the position of distrusting the theory of entering China, and argued that the possibility of Baekje's entry into China should be examined and examined.In Chapter 3, the historical materials were divided into Chinese Southern Dynasties' Yoseo Jinpyeong, Yoseo-related articles, Baekje and Northern Wei's engagement articles, Baekje's territorial articles, and Baekje's fall and territorial division articles.Finally, Chapter 4 specifically proved and examined the possibility of Baekje's entry into China through historical data, the timing, duration, and location.   As discussed in this paper, it was found that Baekje's distrust of the theory of advancing into China was very irrational and not an attitude to explore history.Even if it appears only in any of the historical records, its realism and objectivity should be considered, but as we have seen in this paper, it is unreasonable to unconditionally reject it even though there are various direct and indirect sources.Now, Baekje's entry into China is a clear fact, and the remaining problem is to find out what the nature of the entry was and how far it was.I think the nature and scope of this can be identified according to the deepening understanding of the early history of Baekje, the summary of China, the change of situation in the East Coast region, and the increase in understanding of culture.Currently, middle and high school Korean history textbooks explain Baekje's entry into China as a vague description.I believe that if further research is conducted in the future, Baekje's entry into China will be described as a more definite fact.