Students learn waste classification during summer vacation in China's Shandong

A teacher gives students a test for the waste classification during a summer vacation course at a bookstore in Qingdao, east China's Shandong Province, Aug. 24, 2019. Various activities on the waste classification are held during a summer vacation course at a bookstore to raise students' awareness of the issue in Qingdao. (Xinhua/Li Ziheng)