Introduction to Xuanyuan Bridge: At the north end of Huangdi Mausoleum Square is Xuanyuan Bridge. The entire bridge is made of flowerstone materials. It is 8.6 meters wide, 66 meters long and 6.15 meters high. The whole bridge has 9 spans in total. There are 121 stone beams and guardrails on the bridge deck. The railings are all carved with classical patterns, making it look rough and simple. Under Xuanyuan Bridge and on the water surface to its left and right is Yinchi, which covers an area of more than 300 acres and has a water storage capacity of up to 460,000 square meters.