Health care refers to maintaining, conditioning and supporting life. That is to say, based on the principle of regulating yin and yang, harmonizing qi and blood, and preserving spirit, we can achieve the goal of health and longevity through various methods such as regulating mind, guiding breath, regulating four seasons, supplementing food, supplementing medicine, abstinence, avoiding food and so on. Health preservation comes from the needs of ancient ancestors to resist the harsh natural environment, regulate physical strength, resist diseases and prevent diseases. Health preservation is an organic part of China traditional culture, and it is the result of our ancestors' summing up life experience in long-term life practice.