Qianfeng old man introduced the secret method of Taoist Dragon Sect into four hands: first, refining qi; Second, the spirit of changing hands; Third, the hand is still empty; Fourth, the traditional skill of giving up refining without making was compiled into a book, and the title of the book "Life Law" has been passed down to this day. Since then, the double cultivation life of Taoist tantric has spread all over the world. As a vast number of health lovers, learning classic books has made outstanding contributions to the development of Longmen's double cultivation of health.