“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.’ ”,>So, what is the Tai Chong meridian, and what is the Ren meridian,He had spent many years studying haphazardly, achieving mediocre grades. He was admitted to a second-tier medical school and after graduation, his skills as a practitioner were naturally not very good.。