The written records about the shape and nature of Linglong Instrument in Linglong Yi Ming are as follows: "... each method has its own application. Extract from users and refine their devices. 100000 mesh, evenly distributed in latitude and longitude. Harmony with the sky, in line with the rules. Black and white, Chinese and foreign propaganda. Xuan Xiang Rosen, don't count. Stay away from once and go to a great extent. People look at it from the middle, and their eyes are self-evident. There are many sages, but this system has not yet been made. If you translate this passage in modern language, it will be like this: "... astronomers make instruments and images, each with its own purpose, and only multi-purpose exquisite instruments are integrated. There are more than 65438+ million small holes on the surface of the instrument evenly distributed along the longitude and latitude lines, which are exactly consistent with the celestial sphere according to the law. The void of the whole instrument is bright and visible inside and outside. Although there are countless stars in the sky, they all stay and go to extremes. As long as you look inside with this instrument, you can understand it immediately. There were many ancient sages, but this musical instrument was not invented until the Yuan Dynasty ... "