Yun Xiao, the only descendant of the Jiang family, a Chinese family of cultivation. He was abandoned when he was a child because of his identity as a woman. He accidentally came to the magical world of the West and became good friends with Lucius, Narcissa and Snape. Later, he was forced to return to China due to family changes. When Yun Xiao came back, it was time for Voldemort to disappear, but due to physical reasons, he could not be with his original friends.
During the period of recuperation, he unexpectedly met Dumbledore, and then devoted himself to learning Western magic. Time passed like this until August 1, 1991.