Hello, shrinking yin is a way for women to improve the quality of husband and wife's sexual life. Now vaginal contraction is a topic of concern to many women who have given birth to children, because many women will affect the normal sexual life of husband and wife because of vaginal relaxation after delivery. In this case, it is recommended to practice anal contraction. The method is to make the vaginal and anal muscles contract and relax, that is, lift the anus to contract the vagina when inhaling and relax when exhaling. 20 minutes twice a day.