Orientals attach importance to low temperature, and as early as in the classic of traditional Chinese medicine, Huangdi Neijing, it has been put forward: "Those who go up live long, and those who go down die." That is to say: the temperature in high places is low, so people living there live longer; The temperature in the lower part is higher, so people living there live shorter lives. We also found that there are many longevity stars in the high mountains.

Why is this? Because cold can lower people's body temperature, low body temperature leads to slow cell division and slow metabolism, so aging comes late and life expectancy is naturally long. According to, people with yin deficiency need low temperature most. Because people with yin deficiency are afraid of heat, they often show fever in five hearts (palm, foot and heart). Low temperature can lower body temperature and maintain yin meridian, so low temperature is helpful to nourish yin.

Also, low temperature is good for the brain. The brain is most afraid of heat. On winter nights, Yin Qi is very big and the temperature is very low. This low temperature state is most beneficial to the brain. This is also the reason why people are inefficient in hot summer.

In autumn and winter, yin generates and yang disappears, and the effect of nourishing yin is the best. In winter, the room temperature generally does not exceed 24 degrees Celsius, so it is advisable to wear a sweater.

Eat nourishing yin in winter, including aquatic plants such as rice and lotus root; Overwintering plants such as Chinese cabbage and radish; Plants born in the shade, such as mushrooms, mushrooms; Foods that mature in winter, such as winter pears and winter dates. Drink more well water and groundwater to nourish yin in winter; Eat animals with low body temperature, such as ducks and fish.