To answer your question, we must first clarify a few concepts: 1. Taoism and Taoism are not the same thing. Taoism is a theoretical system in the Spring and Autumn Period. Taoism developed from the "Five Pecks of Rice" religion that emerged in the late Eastern Han Dynasty. 2. Only after the Hetu and Luoshu came out did Fuxi perform the Bagua according to the pictures. 3. The Book of Changes is not a Taoist classic. It is named after King Wen’s performance of the Eight Trigrams. It was first called the Book of Changes. There are three types of Yi - changeable, simple, and difficult; the other refers to the Guizang Yi, Lianshan Yi, and Zhou Yi. The Guizang Yi and the Lianshan Yi were mainly used in Kanyu and astrology. They have been lost and can only be seen in folk fortune-telling, divination, Feng Shui and geography. 4. Taoists first recommend Huang Lao, that is, the Yellow Emperor and Laozi. The representatives are "Huangdi Neijing" and "Laozi". The theory of Lao and Zhuang comes from Taoism. In Taoism, "Laozi" became "Daodejing"; "Zhuangzi" became "Nanhua Sutra". Laozi inherited the Yellow Emperor's teachings and founded the Taoist school. 5. Taoism combines the connotation of Taoism to teach. From this, the stages and levels of practice similar to Buddhism are derived - Wuji produces Tai Chi, Tai Chi produces two rituals, two rituals produce four images, and four images produce Bagua, changing back and forth, even to infinity.