Volunteer teacher Tian Mengting teaches students to play percussion instrument in Linxi County, Xingtai City, north China's Hebei Province, July 24, 2017. The Experimental Primary School of Dongliushangu Village founded a children's palace during summer vacation, which offers courses for free, like dancing, painting, calligraphy, and has attracted more than 200 kids. (Xinhua/Zhu Xudong)