In this photo released by Xinhua News Agency, residents line up for COVID-19 tests in Qingdao this week. China says it has carried out 10 million tests in the northern port city, with no new cases found.

In this photo released by Xinhua News Agency, residents wearing face masks to help curb the spread of the coronavirus line up for the COVID-19 test near the residential area in Qingdao in east China’s Shandong province on Tuesday, Oct. 13, 2020. China says it has carried out more than 4.2 million tests in the northern port city of Qingdao, with no new cases of coronavirus found among the almost 2 million sets of results received. (Li Ziheng/Xinhua via AP)