Introduction to the tomb passage: The Queen's Tomb is also a large-scale cliff cave tomb that "cuts the mountain to form an outline and penetrates the stone to hide". The tomb is large in scale, complex in structure, and finely carved. It is a huge underground building complex composed of 2 tomb passages, 3 corridors, vestibule, front chamber, back chamber, tunnel, drainage system and 34 side chambers. The total length of the tomb from east to west is 210.5 meters, the widest point is 72.6 meters, and it is the highest in the tomb. The height is 4.4 meters, the maximum drop is about 17 meters, the total area is more than 1,600 square meters, and the total volume is more than 6,500 cubic meters. It can be called "the first stone chamber mausoleum in the world".