Which school is the division of Yin and Yang in Gansu?

One of the schools of yin-yang and five elements theory. According to the theory of Yin-Yang and Five Elements, this paper studies the changing law of all things and predicts the unity of man and nature, the change of fate, health and longevity, and the change of geomantic omen. Gansu has a long history and profound cultural heritage, which has produced a large number of excellent teachers of Yin and Yang, leaving behind a lot of profound cultural essence of Yin and Yang.