A student shows her earnings 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. (Photo: Xinhua)

Students put waste into different baskets 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. (Photo: Xinhua)

Students come to the "Green Bank" to trade waste for credits 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. (Photo: Xinhua)

Students weigh waste 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. (Photo: Xinhua)