Keeping in good health in September should be based on the law of the balance of yin and yang, so that the body can maintain the principle of "Yin and Yang are the secrets". It is advisable to avoid cold air, restrain emotions and cultivate optimism. Mental conditioning is very important in autumn, because there is a feeling of dying in autumn, and people are prone to "sad autumn". Therefore, it is necessary to cultivate optimism and maintain peace of mind to adapt to the calm atmosphere in autumn. If the weather is fine, go out more and enjoy the beautiful scenery of nature.