Children learn to perform Peking Opera under the guidance of a teacher at Pei Yanling art inheritance base in Beidaihe of Qinhuangdao City, north China's Hebei Province, Aug. 20, 2019. The base provides free training classes for children to learn Peking Opera during summer vacation, where children will have opportunities to perform for visitors from home and abroad. (Xinhua/Xing Guangli)