One palace and three mountains, each 15. In other words, you stand in the middle of the room with a compass and set it due north and south. Don't worry, when you see the outermost part of the compass, you will find that due north is the return of Renzi. This is Shuiguakan Palace. This is the second son's palace.
Just say that your elm furniture can be placed in the northeast, east, southeast and south. They are the feng shui grades of the second son, eldest son, eldest daughter and second daughter.
People who know this knowledge seldom come to ask and answer questions. If it helps, remember to help me adopt and praise it.