When the front door is expensive, trees must be planted around people's homes, thinking that the four gods have enough space. According to the cloud, there is running water in the east of the family. If there is no running water, nine willows will be planted instead of dragons. White tiger has a road to the west. If there is no road, plant seven catalpa trees instead of white tigers. There is a sweat pool for Suzaku in the south (front). If there is no mud pond, plant nine osmanthus trees instead of Suzaku. There is a mountain in the north (behind) that is basaltic. If there were no hills, as for the three trees, Xuanwu would not be needed. In doing so, I thought that the four gods corresponded. People in official positions are well prepared and live a long life without illness.