King Sejong is also a water polo-shaped four majorists?

 1. Sejong Annals Volume 25 King Sejong 6 September Gapsul - "The king does not take off his mourning clothes in 3 days and implements the system on 27 days," the king ordered Gwak Jon-jung of Jisinsa Temple and said, "The heavenly god should take off his mourning clothes three days after." The loyalty of the military god is extremely heavy, so I couldn't take off the mourning of the acting emperor = Yeongrakje in three days, and the royal court practiced the reverse moon system in Gorye, but now I'm wearing white clothes after three days.Jo, Shinsang, Myeongdeok, etc. posted a discussion and said, "All the doctrines of the residents are right," and Yu Jeong-hyeon, Yi Won, Yugwan, Byeon Gye-ryang, and Jo Mal-saeng posted a discussion, "That's the old Yemun, and King Taejo's devotion to protecting the people." 2. The Annals of King Sejong Volume 125 In September 31, King Sejong - "The Crown Prince Feast at Taepyeonggwan for the royal dance" The Crown Prince Feasted the royal dance at Taepyeonggwan. There was no fact that the king did not personally inspect all the contributions to respecting and serving China. As he said earlier, "The servant shall serve the king with sincerity and honesty, and shall not use authority or anomalies." Therefore, China also praised the intelligence of things because they all followed the law without any fault. Mu came to support the edict as Yodong Byeolgyo Bridge, but he treated it very generously and was like a Jogwan.