Sanitation workers pose for a portrait in front of a house in Gulangyu of Xiamen, East China’s Fujian province, in December 2020. Photo: VCG

A worker cleans a street at night in Chengdu, Southwest China’s Sichuan province, in January 2020. Photo: VCG

A cleaner sprays water on a road in Xiamen in June 2018. Photo: VCG

Cleaners disinfect a road wearing protective suit in Hong Kong on July 11, the day Hong Kong reported one Covid-19 case. Photo: Zhang Wei/China News Service, VCG

A cleaner sits in front of a fresco wall to take a rest in July 2019 in Shenyang, Northeast China’s Liaoning province. Photo: VCG

A worker cleans up leaves in fog in November 2018 in Taizhou, East China’s Jiangsu province. Photo: VCG

Workers shovel the snow in January 2018 in front of Lihanmen, one of the six gates of Xiangyang in central China’s Hubei province. Photo: VCG

Peng Wencai, who serves as a cleaner in Mount Emei Scenic Area in Chengdu, Southwest China’s Sichuan province, slides down a cliff using a rope to clean up waste thrown by tourists in 2014. Photo: VCG

A cleaner drags a litter bin on a beach on Jan. 7 in Lianyungang, East China’s Jiangsu province. Photo: VCG

A worker picks floating waste in the Three Gorges Reservoir area in central China’s Hubei province in 2014. Photo: VCG

A worker sweeps fallen leaves wearing a bamboo hat on Feb. 27 in Qionghai, South China’s Hainan province. Photo: VCG

A worker cleans up waste in Crescent Lake scenic area in Dunhuang, Northwest China’s Gansu province, on April 3. Photo: VCG