
Tourists visit the Qiaoling archaeological park in Pucheng County, northwest China's Shaanxi Province, April 17, 2017. Qiaoling Tomb is for Li Dan, Emperor Rui Zong of Tang Dynasty (618-907). (Xinhua/Tao Ming)

Tourists visit the Qiaoling archaeological park in Pucheng County, northwest China's Shaanxi Province, April 17, 2017. Qiaoling Tomb is for Li Dan, Emperor Rui Zong of Tang Dynasty (618-907). (Xinhua/Tao Ming)