Princess Jangnyeong (Korean: 장녕공주 or 장녕옹주; Hanja: 長寧公主 or 長寧翁主) was a Goryeo Royal Princess as the only daughter of King Chunghye and Princess Deoknyeong,[1] also the full sister of King Chungmok.
Princess Jangnyeong married King No, but after the fall of Yuan dynasty, he disappeared in Bukpyeong.
Having heard about this, her uncle, King Gongmin ordered Seong Jun-deuk (성준득) to search and find her.
Later, in April 1370, Emperor Hongwu visited her in Beijing, treated her carefully and sent her back to Goryeo again.
The king treated his niece with hospitality and took care of everything she needed.