People visit the site of Xanadu in Zhenglan Banner of Xilingol League, north China's Inner Mongolia Autonomous Region on July 22, 2020. Located in Zhenglan Banner of Xilingol League, north China's Inner Mongolia Autonomous Region, the relic site of Xanadu, or Yuan Shangdu ruins, is one of the best preserved sites of the capital cities of Yuan Dynasty (1271-1368) in China. Listed by UNESCO as a World Cultural Heritage Site in 2012, site of Xanadu is resulted from the clashing and blending of grassland culture, farming culture and Western civilization. (Xinhua/Liu Lei)

People visit the site of Xanadu in Zhenglan Banner of Xilingol League, north China's Inner Mongolia Autonomous Region on July 22, 2020. Located in Zhenglan Banner of Xilingol League, north China's Inner Mongolia Autonomous Region, the relic site of Xanadu, or Yuan Shangdu ruins, is one of the best preserved sites of the capital cities of Yuan Dynasty (1271-1368) in China. Listed by UNESCO as a World Cultural Heritage Site in 2012, site of Xanadu is resulted from the clashing and blending of grassland culture, farming culture and Western civilization. (Xinhua/Liu Lei)

Aerial photo taken on July 22, 2020 shows the site of Xanadu in Zhenglan Banner of Xilingol League, north China's Inner Mongolia Autonomous Region. Located in Zhenglan Banner of Xilingol League, north China's Inner Mongolia Autonomous Region, the relic site of Xanadu, or Yuan Shangdu ruins, is one of the best preserved sites of the capital cities of Yuan Dynasty (1271-1368) in China. Listed by UNESCO as a World Cultural Heritage Site in 2012, site of Xanadu is resulted from the clashing and blending of grassland culture, farming culture and Western civilization. (Xinhua/Liu Lei)

People visit the site of Xanadu in Zhenglan Banner of Xilingol League, north China's Inner Mongolia Autonomous Region on July 22, 2020. Located in Zhenglan Banner of Xilingol League, north China's Inner Mongolia Autonomous Region, the relic site of Xanadu, or Yuan Shangdu ruins, is one of the best preserved sites of the capital cities of Yuan Dynasty (1271-1368) in China. Listed by UNESCO as a World Cultural Heritage Site in 2012, site of Xanadu is resulted from the clashing and blending of grassland culture, farming culture and Western civilization. (Xinhua/Xu Qin)

People visit the site of Xanadu in Zhenglan Banner of Xilingol League, north China's Inner Mongolia Autonomous Region on July 22, 2020. Located in Zhenglan Banner of Xilingol League, north China's Inner Mongolia Autonomous Region, the relic site of Xanadu, or Yuan Shangdu ruins, is one of the best preserved sites of the capital cities of Yuan Dynasty (1271-1368) in China. Listed by UNESCO as a World Cultural Heritage Site in 2012, site of Xanadu is resulted from the clashing and blending of grassland culture, farming culture and Western civilization. (Xinhua/Xu Qin)

Photo taken on July 23, 2020 shows Mongolian yurts near the site of Xanadu under the starry sky in Zhenglan Banner of Xilingol League, north China's Inner Mongolia Autonomous Region. Located in Zhenglan Banner of Xilingol League, north China's Inner Mongolia Autonomous Region, the relic site of Xanadu, or Yuan Shangdu ruins, is one of the best preserved sites of the capital cities of Yuan Dynasty (1271-1368) in China. Listed by UNESCO as a World Cultural Heritage Site in 2012, site of Xanadu is resulted from the clashing and blending of grassland culture, farming culture and Western civilization. (Xinhua/Liu Lei)

Aerial photo taken on July 22, 2020 shows the site of Xanadu in Zhenglan Banner of Xilingol League, north China's Inner Mongolia Autonomous Region. Located in Zhenglan Banner of Xilingol League, north China's Inner Mongolia Autonomous Region, the relic site of Xanadu, or Yuan Shangdu ruins, is one of the best preserved sites of the capital cities of Yuan Dynasty (1271-1368) in China. Listed by UNESCO as a World Cultural Heritage Site in 2012, site of Xanadu is resulted from the clashing and blending of grassland culture, farming culture and Western civilization. (Xinhua/Xu Qin)

Photo taken on July 23, 2020 shows the site of Xanadu under the starry sky in Zhenglan Banner of Xilingol League, north China's Inner Mongolia Autonomous Region. Located in Zhenglan Banner of Xilingol League, north China's Inner Mongolia Autonomous Region, the relic site of Xanadu, or Yuan Shangdu ruins, is one of the best preserved sites of the capital cities of Yuan Dynasty (1271-1368) in China. Listed by UNESCO as a World Cultural Heritage Site in 2012, site of Xanadu is resulted from the clashing and blending of grassland culture, farming culture and Western civilization. (Xinhua/Xu Qin)

Photo taken on July 23, 2020 shows the site of Xanadu under the starry sky in Zhenglan Banner of Xilingol League, north China's Inner Mongolia Autonomous Region. Located in Zhenglan Banner of Xilingol League, north China's Inner Mongolia Autonomous Region, the relic site of Xanadu, or Yuan Shangdu ruins, is one of the best preserved sites of the capital cities of Yuan Dynasty (1271-1368) in China. Listed by UNESCO as a World Cultural Heritage Site in 2012, site of Xanadu is resulted from the clashing and blending of grassland culture, farming culture and Western civilization. (Xinhua/Liu Lei)