Introduction to the Xiaoling Seven-hole Arch Bridge: The arch bridge is the highest grade among stone bridges. There is only one seven-hole arch bridge in Xiaoling Mausoleum in the Eastern Tombs of the Qing Dynasty. The bridge is 110 meters long, with 126 stone railings, 128 stone pillars and 4 drum-holding stones installed on both sides. From a distance, it looks like a rainbow lying on the waves, majestic and spectacular.