In pics: great wall in Guyang County, N China's Inner Mongolia

Aerial photo taken on Nov. 13, 2019 shows the great wall in Guyang County, north China's Inner Mongolia Autonomous Region. The great wall, with a length of 95.6 kilometers and located on a mountain in Guyang, is mainly built with stones and has been preserved for over 2,000 years. (Xinhua/Peng Yuan)