Aging is an inviolable natural law. With the increase of age, the functions of various organs and systems of human body will inevitably decline, which can be manifested as skin wrinkles, senile plaques, decreased muscle endurance and decreased vital capacity. This is a normal phenomenon. However, the speed of aging is closely related to health care. Healthy living environment, reasonable diet, good sleep, regular exercise and optimistic attitude are helpful to keep physical and mental health and delay aging.