What is the saying that a square fish pond is opened in the backyard?

I advise you not to drive unless you have water in the northeast and northwest. Otherwise, disaster is coming, and the backyard is north. Look at Guan Yu's explanation. The north is divided into three directions: non-water, secondary water and decyl, each of which is 15 degrees. If it's not water or Erlang, the water must be divided into two rooms first, and there is no turning back when buying. No child escapes, and death is a hook.