Health preservation is not a simple physical exercise, nor a nutritious meal. It is a set of Taijiquan and a set of natural health exercises, which temporarily adjusts the heart energy. Health preservation is based on the principle of regulating yin and yang, regulating qi and blood, and preserving spirit, and uses various methods such as regulating mind, guiding breath, regulating four seasons, supplementing food, supplementing medicine, abstinence, avoiding valley naturally, etc., so as to achieve the purpose of health preservation, recuperation, caring for life and realizing human health and longevity.