How to judge the number of rooms in the tomb

Usually it is the right side of the big room, the left side of the second room, the middle of the third room, the right side of the fourth room, the left side of the fifth room, and so on.

There are sand pipes on the left side of the tomb, rooms 1, 4 and 7.

There are upward sand pipes in the middle hall of the tomb and rooms 2, 5 and 8.

There are sand pipes on the right side of the tomb, rooms 3, 6 and 9.