Volunteers collect wastes by a river in Yangzhou, east China's Jiangsu Province, on June 4, 2025. Various events are held to raise people's awareness of environmental protection in China ahead of World Environment Day, which falls on June 5. (Photo by Ren Fei/Xinhua)

Primary school students clean up garbage at Binhai Park in Rongcheng City, east China's Shandong Province, on June 4, 2025. Various events are held to raise people's awareness of environmental protection in China ahead of World Environment Day, which falls on June 5. (Photo by Li Xinjun/Xinhua)

Faculty members and students of Southwest University test the water quality of a lake to find out the water situation on the campus in southwest China's Chongqing, on June 4, 2025. Various events are held to raise people's awareness of environmental protection in China ahead of World Environment Day, which falls on June 5. (Photo by Qin Tingfu/Xinhua)

Students display paintings themed on environmental protection at a primary school in Xinghua City, east China's Jiangsu Province, on June 4, 2025. Various events are held to raise people's awareness of environmental protection in China ahead of World Environment Day, which falls on June 5. (Photo by Zhou Shegen/Xinhua)

Children take part in a waste-sorting simulation at a kindergarten in Suzhou, east China's Jiangsu Province, on June 3, 2025. Various events are held to raise people's awareness of environmental protection in China ahead of World Environment Day, which falls on June 5. (Photo by Hang Xingwei/Xinhua)

An aerial drone photo taken on June 4, 2025 shows volunteers collecting wastes at a wetland park in Tengchong, southwest China's Yunnan Province. Various events are held to raise people's awareness of environmental protection in China ahead of World Environment Day, which falls on June 5. (Photo by Gong Zujin/Xinhua)