from four in the morning to five in the afternoon. According to the inquiry of jiangjin district Municipal People's Government, the sanitation workers in Jiangjin go to work from 4: 11 to 7: 11 every day, all year round. Sanitation workers are praised as urban yellow roses, street angel and urban beauticians, who are mainly responsible for street sanitation and cleaning. Every year, October 26th is the Sanitation Workers' Day.