Relationship between Balhae and Goryeo.

 The fall of Balhae and the founding of Goryeo took place almost simultaneously. For this reason, Goryeo tried to actively cope with the turbulent situation of the fall of Balhae by the Khitan, especially after unifying the Later Three Kingdoms from the beginning of its foundation. Accordingly, King Taejo Wang Geon of Goryeo, who founded Goryeo, refused to establish diplomatic relations with Khitan, while trying to counter the Khitan in connection with the younger generation of China, and at the same time actively accepted the people of Balhae. This special situation is told in Goryeo history as follows. " When Georan sent a envoy to send 50 camels, King Taejo of Goryeo finally broke off the friendship, saying that Georan had early Balhae and softened it, but suddenly betrayed another heart and destroyed Balhae. And the 30 lions were exiled to the sea island, and the camels were tied under Manbugyo Bridge, causing everyone to starve to death." In this way, King Taejo of Goryeo not only refused to establish diplomatic relations with Khitan, but also attempted to attack Georan in conjunction with China's backward movement, and accepted numerous Balhae refugees without rejecting them. ==== Central ========= (List of records that numerous Balhaeans have fled to Goryeo) ================================= However, these responses were not all because Balhae and Goryeo were relatives or relatives, as Wang Geon said, but only the result of the Goryeo founders' simo-principle. In the Sangseomun written by Choi Seung-ro to Seongjong, Kitan borders us, so of course, they defended it first, and they sent lions to save their friends. The reason why we cut off socializing with them was that the country came early and softened, but suddenly took a different heart and destroyed it overnight without taking care of the old pledge. As a result, King Taejo abandoned all the camels they offered and did not raise them, saying that their dance was too much to be cultivated. The deep plan was to prevent suffering in advance and protect the country before it became dangerous. When Balhae was destroyed by the Khitan, the Crown Prince Dae Kwang-hyun and others saw that the Korean nation took place with righteousness and ran away quickly day and night with tens of thousands of households. King Taejo was more pitiful and welcomed him and treated him very well, so he gave a name and made him ascended to the headquarters, and allowed him to hold ancestral rites of his ancestors. It was also the same that King Taejo was able to bring in a person from a faraway place to surrender and keep the ruined country alive, not due to the deep relationship between King Taejo and his relatives in Liao was built in Liaodong at the time. In addition, Goryeo subtly approached Balhae residents such as Daeyeonrim and Go Youngchang when Daeyeonrim of Khitan revolted, and Gwakwon of Goryeo insisted on taking advantage of the opportunity to attack each other, but the king and other officials considered it. In this way, while Goryeo avoided diplomatic relations and cooperation with the country established by Yumin in Balhae, eight bent-down people, who are 18 people, (6 people, 52 people, 89 people), struggled with the influx of exile by various types of fluctuating groups. Goryeo history) The fact that it continued to accept proves that Goryeo's acceptance of Balhae Yumin did not stem from ethnic approximation. In fact, Balhaein's exile to Goryeo was described as having surrendered to Goryeo in the 8th year of King Taejo's reign (Balhaein led the whole country to the royal palace) and Joseon Sagak (the rebellion attacked Balhae, destroyed it, and made it an eastern country). According to the history of Goryeo, as a descendant of Dae, who visited Goryeo from 925 to 1117, there were less than 10 people who entered the country and did not exceed 20 people, so many remained in Dongdan-guk and worked. The total number of Balhae residents who fled to Goryeo at the time does not seem to exceed 100,000, and considering the research results that the total population of Balhae was about 3 million just before its collapse (strike the population of Balhae residents in Goryeo). In addition, even after the fall of Balhae, most of the population of Balhae was moved from the eastern part of Liaodong to the nursing area, but not to Goryeo. In 928, shortly after the fall of Balhae, the people of Dongdan were moved to live in nursing care, and it was promoted to Namgyeong (Yosa 38 Geography 2) and in 1029, Daeyeonrim revolted in connection with Liaodong, and even after surrender a year after being siege, they all moved to 北으로 and established prefectures. In addition to (Yosa 37 Geography 1), there are many records in Yosa Geography that say that the population of Balhae has moved to the center of fluctuation, so it cannot be said that it is based on sufficient evidence to understand Balhae as a country that played a major role in forming Korea based on the influx of Balhae population to Korea.