“The Shanggu Tianzhen Lun in the Classic of Internal Medicine states: ‘When a woman is seven years old, her kidney qi is strong, and her teeth grow more; at twenty-seven, Tian Gui arrives, the Ren meridian is open, the Tai Chong meridian is strong, and menstruation occurs on time. Therefore, menstruation is due to strong kidney qi, the arrival of Tian Gui, the opening of the Ren meridian, the strength of the Tai Chong meridian, and the coordinated action of viscera, blood and meridians on the uterus, which stores and releases regularly, resulting in menstruation.’ ”,Li Yuan nodded happily and said, "Yes, thank you for your encouragement, Director Sun!",Doesn't Li Yuan want a carefree and happy life from the bottom of his heart。