The Zhen Ren Xiu Xing Yan Nian Yi Suan Fa 洞玄灵宝真人修行延年益算法

The Method of Cultivating for Longevity and Benefiting Life by the True Immortals of the Cavern Mysterious Numinous Treasure has an unknown author and date of composition.

It consists of one scroll and is included in the Orthodox Unity Section of Daozang (the Taoist Canon).

This book is a compilation of essential Taoist practices, including methods of contemplating deities, improving eyesight, preserving the One (a core Taoist meditative practice), dispelling nightmares, restraining the soul and controlling the spirit, seeking immortality, curing illnesses, methods for sleeping at dusk, massage techniques, hair-combing rituals, protocols for wearing new clothes, and practices for using grass when using the latrine, among others. These Taoist methods are mainly centered on visualizing deities and reciting mantras, and are used to eliminate disasters, ward off evil spirits, cure diseases, and prolong life.