China carries out 4.2 million tests in Qingdao in campaign to complete testing of all 9 million residents

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.

The city has reported a total of 12 cases, six with symptoms and six without, since the new outbreak was first spotted over the weekend at a hospital.