Qianling is located on Liangshan Mountain, 6 kilometers north of Ganxian County, Xianyang City, Shaanxi Province. It is a joint burial tomb of Tang Gaozong Lizhi and Wu Zetian. Qianling was built in the first year of Tang Guangzhai (684), and Shenlong two years (706), and the construction method of "Because the mountain is the mausoleum" was adopted. In addition to the main tomb, there are 17 small burial tombs in Qianling, which are buried with other royal family members and dignitaries. Qianling is the most well-preserved tomb in the 18th tomb of Tang Dynasty, and the only tomb in Tang Dynasty that has not been stolen. On March 4, 1961, Qianling was announced by the State Council as the first batch of key cultural relics protection units nationwide.