Traditional Chinese medicine emphasizes "don't disturb the yang, go to bed early and get up late, and wait for the sun", that is, in cold winter, don't disturb the physiological function of the transformation of yin and yang because of disturbing the yang. Just as "in winter, heaven and earth are closed, blood is hidden, and people can't sweat out yang." Therefore, going to bed early and getting up late, and doing it at sunrise, to ensure adequate sleep, is conducive to hiding yang and yin and essence. Too few clothes are too thin, and the room temperature is too low, which is easy to catch a cold and consume yang. Traditional Chinese medicine emphasizes "don't disturb the yang, go to bed early and get up late, and wait for the sun", that is, in cold winter, don't disturb the physiological function of the transformation of yin and yang because of disturbing the yang. Just as "in winter, heaven and earth are closed, blood is hidden, and people can't sweat out yang." Therefore, going to bed early and getting up late, and doing it at sunrise, to ensure adequate sleep, is conducive to hiding yang and yin and essence. Too few clothes are too thin, and the room temperature is too low, which is easy to catch a cold and consume yang. ?