What is recorded in Taoist classics?

Taoist classics are extremely rich in content and all-encompassing. Taoist classics, theories, precepts, spells, spells, etc., include Lingbao Infinite Man's Sutra Dafa, Daofa Hui Yuan, Taishang Cave's mysterious Lingbao Suoling Zhen Fu, etc. Zhai Yi, Lingbao Salvation, Nine Secrets, and other ancient books on fasting science and instruments, such as Zhouyi Shentongqi, China Ancient Dragon and Tiger Classic, then Elixir, Fetal Breath Classic, Five Needles Tablet, etc. This kind of Taoist scriptures constitute the main body of Taoist classics and are the basic materials for studying Taoist teachings, schools, rituals and Taoism. Among them, Taoist books on alchemy, self-cultivation and witchcraft contain a lot of ancient chemistry and medical knowledge, which have high scientific and technological value.