What is Sanma's homecoming?

"Five Horses Returning to the Nest" was originally a geomantic term in China. Generally, it means that five horse-shaped mountains point to a place where acupuncture points are pricked, and the acupuncture points are in a hall, so it is easy to choose mountains and directions, and the pattern of Qinglong, Baihu, Xuanwu and Suzaku is obvious. There is also writing "noon horse returns to the trough", which belongs to the horse at noon, and the horse is at noon. There is also a good feng shui city as the origin of the afternoon mountain.