Because I know more about health care. Laozi's philosophy of life provides an ideological source for the natural way, four-season health care and quiet health care in TCM health care theory. Its "Taoism is natural" is the basis of the theory of four seasons health preservation; "Be empty, be quiet and believe" pushes the theory of static health preservation to the extreme; "The movement against the Tao" contains the philosophical implication that the extremes of things must be reversed, and refines the spiritual adoption theory of "being indifferent to the open and keeping the spirit inside".