The immortality that Chang pursues refers to the state of permanent physical and mental aging achieved through cultivation and practice. In the traditional culture of China, immortality is regarded as an ideal realm and an important goal by many monks and Taoists.

In the immortal way, longevity is considered to be related to inner alchemy, health care, mental health care, self-cultivation and so on. The cultivation of Neidan is to use various methods of cultivation and recuperation to improve the energy in the human body, so as to achieve the purpose of strengthening the body and prolonging life. Health care focuses on reasonable diet, moderate exercise, adequate rest, good mood, etc., in order to maintain good health and delay aging. Nourish the mind, keep inner peace and purity, and avoid excessive thinking and emotional fluctuations, so as to improve physical and mental health and further promote the cultivation of longevity. Self-cultivation refers to improving one's moral quality and spiritual cultivation through moral cultivation, self-correction and spiritual cultivation, so as to achieve the goal of immortality.

But as a realm, immortality is actually a very profound topic, and it is difficult for ordinary people in real life to achieve the real realm of immortality. Therefore, ordinary people should pay attention to maintaining healthy living habits, exercising, preserving souls and delaying aging, instead of blindly pursuing immortality.