Who is familiar with the history of Confucianism and Taoism? What is magic? Does the "square" here refer to the region or the specific conditions?

Alchemy has two meanings. One refers to the ancient methods of governance. "Zhuangzi is the world": "There are many people who rule the world." Cheng said, "The square is the way. From the beginning of Xuanzang to the end of Yao and Shun, there are many ways to cure the Tao. " Second, it refers to ancient China divination, astrology, armor avoidance, geomantic omen, immortal art and so on. Using the phenomenon of natural variation and the theory of yin-yang and five elements.