Understand the next sentence, keep in good health and spend the winter skillfully. According to relevant public information, as the saying goes: "Make up for a winter in September, and you won't get sick in the coming year". It is better to prevent diseases than to cure them. After beginning of winter, Li Yudong, deputy director of Beijing Hospital of Traditional Chinese Medicine, said: Know how to keep in good health and spend the winter skillfully. The three months of winter are the season when everything is full of vitality and hidden. In this season, water will freeze and the earth will crack, so people should not disturb the spirit of the sun. If they want to go to bed early and get up late, they must wait until the sun comes up. Let emotions lie in ambush like an army, like fish and birds hiding deep, like people having privacy, like getting something from their hearts, and so on. Also stay away from cold places, close to warm places, and don't let your skin sweat, which will cause a large loss of yang. This is the law to adapt to the winter weather and maintain the hiding function of the human body.