Supplementing Yang with Yin or Yang with Yin is a Taoist cultivation method, which means that men and women achieve the "balance of Yin and Yang" in the body through sexual intercourse. It belongs to the concept of "chamber art" of ancient Taoism in China, and some people who practice Tai Chi have tried it. Picking and mending is also mentioned in martial arts novels, which is generally considered as a means to improve martial arts, but its actual effect cannot be scientifically confirmed.

The original meaning of Taoism is that men "value women without catharsis" and "count women without catharsis" Because "the climax of female sexual intercourse can strengthen the vitality of men, so men's sexual behavior should be prolonged as much as possible to achieve the purpose of collecting yin and replenishing yang." According to Volume 27 of "A Thousand Daughters Must Be Determined", "A man who practices in his husband's room is very close to the Tao, but no one can do it.