It's simple. Every flying star in the mountain enters the palace five times, returns to the palace in a straight line, and then dries. The number of flying stars is the same as the site. Going retrograde in the middle, going out of the palace, and going to Kanggongjiu will be the opposite rhyme, but you must go to the mountain. Every twenty-four mountains have the same place, which is called chanting.
Song Dynasty: There are 258 Yun Kun Gengong (Gen, Kun, Shen and Yin), 37 Yun Zhen Dui Gong (Jia Xu) and 46 Yun Gan Gong (Xun Gan).