What is Professor Wang Yuchuan proficient in?

According to the data, Wang Yuchuan, a master of Yi Studies, is good at geomantic omen, eight-character numerology, six hexagrams, Wei Zi's number-crunching and many other fields. Wang Yuchuan's experience is also legendary. It is said that he happened to meet a true teacher in Taihang Mountain and was worshipped by a generation of secret mage Li. He devoted himself to practice for fourteen years and got everything. On the basis of predecessors' esoteric biography, I have worked tirelessly for 40 years to study Yi-ology, or to educate people with whipping, or to study deeply, and I have accumulated a lot in the field of Yi-ology, and finally established a theoretical system of esoteric Yi-ology.