Being immortal by oneself has both the hope of pursuing eternal freedom of life and the misunderstanding and misreading of Laozi's Taoist thought. In fact, it is an absurd imagination, and the cultivation method under the guidance of this concept (referring to liberation cultivation) has also gone astray. Historically, liberation-oriented cultivation methods can be summarized into three types, namely, taking food, staying in the room and promoting qi circulation. The concepts of eating food (including taking qi, avoiding the valley, taking medicine and taking medicine) and becoming immortal in the house (through sexual intercourse between men and women) may have originated in the late Warring States period. It is not clear whether there is any attachment to Laozi's "Xuanzang, mother, life and valley god". The ancient legend that "the Yellow Emperor ascended to heaven with 1,200 women" recorded in Ge Hong's Bao Puzi Wei Zizhi refers to the art of making women live forever. Scholars have discussed that it is impossible to transcend life and death, which is an indisputable fact and is quite different from Laozi's practice. Before the formation of Neidan, qi circulation was also quite different from Laozi's way of liberation and cultivation, and it was not the way of liberation. We only talk about inner alchemy and Shen Yuan OBE here.