What is the theoretical framework of China's ancient metaphysics?

The concepts of five elements and branches. As far as I know, this did exist in the pre-Qin period, and it was mostly used in calendars, and it was also predicted in some fields. For example, Huangdi Neijing has diseases, but what will happen in the period of mutual development (the content in my seven articles excludes luck, and the textual research in that period is too controversial, and I also support that he is supplemented by later generations. ), but its metaphysical system is not as complicated as later generations. According to my experience, he should come from the combination of astronomy and natural observation. Anyway, no matter what his background is, it also occupies half of the later theory. For example, the eight characters, five movements and six qi of Chinese medicine. It's just something in the sky. According to the astronomical conclusion, there is also a system. Everyone should know what's going on when watching TV. I won't delve into it unless I study it. These big things, based on the pre-Qin period, derived the metaphysical system of later generations, blended with each other, and added new things developed by later generations to produce various metaphysical systems. For us who study metaphysics, it is also a way to know the world. It just seems that western science is more inclined to space research, while we are more committed to time exploration. Visible space is easy to see, but invisible time is difficult to observe. So it also leads to communication difficulties.