Medical workers transfer a patient with fever symptom from a lock-down area at the Xihu community in Tongan District of Xiamen City, Sept. 23, 2021. . (Xinhua/Jiang Kehong)

Staff members for COVID-19 response stand guard at a checkpoint in Tongan District of Xiamen City, Sept. 23, 2021. (Xinhua/Jiang Kehong)

Wu Hao (1st R), an expert of a group under the State Council inter-agency task force for COVID-19 response, talks with local staff members at Fenggang community in Tongan District of Xiamen City

A staff member disinfects a vehicle at an exit of an expressway according to a protocol to curb COVID-19 in Tongan District of Xiamen City, southeast China's Fujian Province, Sept. 23

Police offers patrol outside a lock-down area at the Xihu community in Tongan District of Xiamen City, southeast China's Fujian Province, Sept. 23, 2021.

Staff members for COVID-19 response deliver food for residents under quarantine at the Xihu community in Tongan District of Xiamen City, Sept. 23

Residents wait in line to receive nucleic acid testing outside a testing site at Butang Village in Tongan District of Xiamen City, Sept. 23