It describes the cycle of cycles, like the flow of water, and is used to represent the dependence and mutual roots of yin and yang, and the mother and son of the five elements. The Houtian diagram is the law derived from the passage of the four seasons and the collection of the growth of all things. ethereum://0xabEFBc9fD2F806065b4f3C237d4b59D9A97Bcac7/30912