What is the basis for determining the sky disk in the sky disk?

The disk of heaven and earth, also called Arabic map, is all made of granite and is a desktop. It is divided into two layers: the lower layer is the abutment, the upper layer is 3.7 meters long and each side is 0.42 meters high. Each side of the disk is engraved with 128 small squares, 5 12 squares a week, and the whole is 16384 squares. Between the squares, eight concentric circles are carved from the inside out to represent "heaven" and the squares represent "earth", hence the name "heaven and earth disk".

It is generally believed that the disk of heaven and earth was specially designed by Daozhou to talk about the Book of Changes. Some people think that it is based on the principle of "Fiona Fang tangency, which becomes flat every eighteen years", so as to measure the weather's sunny or sunny, the omen of the change of the 24 solar terms, etc., but no one speaks a truth about the specific operation. Now this big stone has become a mystery, and no one knows why. Guess it must contain complicated relationships in all aspects, which can only be explained in the dynamic. Huang Daozhou's observation and understanding of the relationship between heaven and earth 300 years ago can be described as "unique" and "unprecedented and unprecedented", which is a milestone in inheriting civilization, especially the development of Yijing.