Ten critical points, one of the nine songs and ten strategies of Feng Shui, are ten requirements of Feng Shui experts for dragons, caves, sand and water. Its song says:
First, you need to open an account; Second, two ears should be inserted into the sky; Third, shrimp and crab eyes; Fourth, hover around; Fifth, stop up and down three times; Sixth, the sand feet should turn; Seventh, the hall should be clean; Eight must close the mouth; Nine must meet with North Korea in Tang Ming; Ten to nine cycles.
Opening an account with metaplasia means that Long Mai is naked and the tent is heavy, and the real dragon comes out through the account; Two ears into the sky, that is, the mountain with two ears behind the hole, should stand upright and think that it should be guaranteed; Shrimp needs crab eyes, refers to the point heart to be understood by the assistant, the news is accurate, and the water around the point is close; Hovering left and right indicates that the package is good; Up and down three stops, that is, Taizu and Shaozu, the knotted mountains are best complete and rich; The sand feet have to turn, indicating that there is affection for the point; Those who have a clean hall should be open and flat, not steep; Shuikou Guanlan means that it must be locked tightly; Tang Ming welcomes the DPRK, referring to the mountains, with clear points; The loop line of Jiuqu is called water wrapped mountain. These ten are the essentials of dragons, caves, sand and water. Not all of them.