Couriers and other delivery personnel in Shijiazhuang were allowed to resume work on Sunday after their test results came back?negative. Authorities have put a number of measures in place to ensure residents' daily needs are met.

Over 25,000 delivery personnel have completed a second round of nucleic acid testing, said Ma Yujun, acting mayor of Shijiazhuang.

Zhao Qi, head of a logistics station in Shijiazhuang's Xinhua district, said most of his delivery workers had returned to their jobs after finishing two rounds of testing. Li Qing, one of the deliverymen, said he was a bit worried when he was told to stop working and quarantine at home late on Tuesday.