From eight in the morning to six in the afternoon. According to the official website of Ningbo Municipal People's Government, the working hours of Ningbo Domestic Waste Classification Guidance Center are from 8 am to 6 pm. Ningbo, referred to as "Ningbo" for short, is a sub-provincial city in Zhejiang Province, a city with separate plans, an important port city in the southeast coast of China and an economic center in the south wing of the Yangtze River Delta approved by the State Council.