Taoism can be divided into inner Dan school and outer Dan school according to Taoism (most modern people regard it as the enlightenment of local chemistry).
According to the theory, Taoism can be divided into: Laozi and Zhuangzi School and Backward School.
Taoism takes Laozi's and Zhuangzi's Taoist thoughts as its purpose, takes Taiji Bagua, Yin and Yang's Five Elements Theory as its guidance, and takes the principles of regulating Yin and Yang, harmonizing qi and blood, and nourishing the spirit as its principle, and uses various methods such as regulating the heart, guiding breathing, taking pictures at four o'clock, geomantic environment, Taoist music painting and calligraphy, tea, food, medicine, abstinence, food, qi and so on. Transform essence into nature, and nourish the day after tomorrow with innate qi. Regulate yin and yang, dredge qi and blood, nourish essence, exercise bones and muscles, support viscera and regulate skin. Achieve the purpose of life cultivation, physical and mental harmony and health.