A teacher introduces artifacts made of waste to students at the "Green Bank" in the Central Primary School of Hongxingqiao Township in Changxing County, east China's Zhejiang Province, Dec. 20, 2018. With help of local government, the school has established a "Green Bank" to recycle waste since May this year. Students can trade waste for plants and stationery in the "Green Bank", which helped improve their awareness of environmental protection. (Xinhua/Xu Yu)