Baili Youyan was sent to Yaowang Valley since she was a child, where she met Yuchiqi, who was still a demon king. Yuchiqi used his injuries to disguise himself as a poor injured person. Yuchiqi and Bailiyouyan spent a good time in Yaowang Valley, but later went back because something happened in the demon world. Later, Yuchi Qi took one of his own souls and went down to earth to undergo calamity, and changed his name to Li Qi...
Intention: I don't know the origin of love