Volunteers collect wastes at the bank of Yellow River in Boxing County of Binzhou, east China's Shandong Province, June 4, 2022.Photo:Xinhua

Sanitary workers collect floats on a river in Suzhou, east China's Jiangsu Province, June 4, 2022.Photo:Xinhua

Volunteers collect wastes at a park in Congtai District of Handan, north China's Hebei Province, June 4, 2022.Photo:Xinhua

Volunteers promote environmental protection knowledge in Xiangdu District of Xingtai, north China's Hebei Province, June 4, 2022.Photo:Xinhua

Residents make artwork with discarded articles in Xiangdu District of Xingtai, north China's Hebei Province, June 4, 2022.Photo:Xinhua