Winter corresponds to the kidney internally. The kidney controls the storage of essence and is the congenital base of life and emotionally associated with fear and fright. Excessive or sudden fear and fright may impair the kidney and cause the pathological changes of the kidney. Accordingly, in winter, the time of hiding, people should stabilize emotions and cultivate the mind. They should be emotionally implicit, quiet and happy to avoid excessive emotional activities; fear, fright and dysphoria should be avoided most so as to guarantee that the normal physiological feature of the hiding of yangqi is not interfered with. Only when the mind is tranquilized, can yangqi inside the body be hidden, yin and essence accumulated. This can create the conditions to generate and develop spring yang for the coming year.