It is the application of Principles of Yin - Yang and five Elements in I-ching to the human body. The meridian and collateral theory covers TCM physiology, pathology, diagnosis, and treatment guiding acupuncture, massage, massage and various clinical practices of TCM. Mastering the distribution, pathway and main functions of meridians and collaterals in the human body is important for health care or health maintenance. According to "Pain indicates impassability, and once passable, there will be no pain" in Traditional Chinese medicine, keeping the meridians and collaterals passable is the most important for disease prevention.
