Suggestion: the principle of health preservation for people with yin deficiency constitution is to nourish yin and reduce fire, calm the heart and soothe the nerves, and give priority to diet and mental conditioning. In diet, it is not advisable to eat warm, dry, spicy and fragrant foods, such as pepper, onion, ginger, garlic, wine, dog meat and mutton. Should eat moist things, such as grapes, pears, bitter gourd, cucumber and so on. And you can often eat lily porridge and yam porridge. People with yin deficiency are prone to yin deficiency and fire in spring, and liver yang is hyperactive, causing insomnia, acne and bad breath. Therefore, it is not advisable to eat warm tonic in spring. For them, ensuring adequate sleep is one of the important ways to keep fit.