The main theories of geomantic omen and traditional Chinese medicine attach importance to the balance of yin and yang and the harmony of the five elements. It's just that feng shui masters mainly use orientation and physical buildings, and they mess with sand and water. Change the balance of yin and yang of human five elements, so as to achieve good fortune and avoid evil. Traditional Chinese medicine mainly uses medicinal materials and physical methods to change the balance of yin and yang and five elements of the human body, so as to achieve the purpose of treating diseases and saving lives.
In geomantic omen, you can look at the articles written by Chen Yifeng, a famous Beijing master. Many theories about Yin-Yang and Five Elements are quite classic.