What two systems are the stars divided into in the new instrument and imaging method?

The new image method introduces the shape and structure of elephants, and also introduces them one by one. Attached drawings 18, including 5 pictures of all-day stars on elephants. These five star maps are divided into two systems. One is the map of Wei Zi Palace with the north pole as the center, and the other is the horizontal map of the equatorial belt. For observers in the northern hemisphere, the Arctic and equatorial regions are relatively clear. The second is the north-south star map with the equator as the boundary. This map overcomes the shortcomings of the traditional sky-covering star map in China, which makes the position distortion of the stars in the southern sky not great. However, due to the absence of Antarctic in the northern hemisphere, the map is blank, which is the first time in the ancient star map of China.