Aerial photo taken on Aug. 3, 2019 shows the archaeological site of the capital of Liao Dynasty (916-1125 A.D.) in Bairin Left Banner of Chifeng, north China's Inner Mongolia Autonomous Region. Bairin Left Banner is the birthplace of the culture of the Khitan-led Liao Dynasty. A large number of 1,100-year-old Liao cultural relics are under preservation by local authorities. (Xinhua/Peng Yuan)