Health care by avoiding grain is a method to make subjects drink water instead of food through the start and development of mental energy, and at the same time, in the state of physical and mental relaxation, regulate the whole body and mind, remove the garbage in the body, eliminate the toxins in the body, cultivate healthy qi in the human body, and achieve health care, enlightenment and development of human potential. Bigu is also called "Quegu", "Broken Valley", "Juegu", "Stop Valley" and "Juegu", which means to eat "Qi" instead of grains and accept spiritual energy. Taoism used to be considered as a way to cultivate immortals, but now it is the health-preserving people who practice their body and mind with spiritual energy.