Female, Yu Zhiguang's younger sister. She is a skilled gynecologist who runs Sanji Hall, a two-story medical clinic. She specializes in infertility issues among young couples. She is strict and serious in her teaching, comparable to the rigid female teachers at the Yu family estate. She taught Yu Zhiguang acupressure points and massage techniques using a teaching acupuncture dummy. She bluntly deduced that Yu Zhiguang's husband cannot get an erection.
