Yi Jin Jing (tondon-changing classic). This method of health-building exercise evolved from ancient China, and its purpose is to strengthen the muscles and tendons. Via research, Yi Jin Jing germinated from regimens practiced during the Qin (221-206 BC) and Han (206 BC - 220 AD) dynasties. Legend says that the monk Bodhidharma, the founder of Zen in China, advanced Yi Jin Jing. And then the monks in the Shaolin Temple developed it and used it to promote health. Its new adaptation for Health Qigong embodies the essences of traditional Yi Jin Jing in 12 forms. It has been developed, simplified and standardized using modern theories and methods of health science, so as to be a smooth and coherent set of movements. Hence it has remarkable tendencies toward promoting health.