Amy Cheng

Qingdao city officials say no new infections were identified. The extraordinary testing effort followed the appearance of a small cluster of COVID-19 cases centered in a city hospital.

Measures to mitigate the coronavirus pandemic have devastated China's economy, shutting factories and urban jobs that millions of migrant workers depend upon. Many now seek jobs in their villages.

China's diplomacy has taken a strikingly "undiplomatic" turn, analysts say, as it counters U.S. accusations of starting the coronavirus.

After a 76-day lockdown, the city's reopening includes the return of its tradition of eating a medley of morning snacks.

As restrictions are relaxed in parts of China where the coronavirus struck, residents in Beijing are cautiously returning to the public spaces they love.

China makes millions of masks. But ramping up production is tricky. "Making masks is not as easy as you imagine," a pharmaceutical executive in China says.

Strict quarantine measures have prevented 300 million migrant workers from returning to work. Now local authorities are trying to get businesses going again. The main bottleneck: a shrunken workforce.

On Monday, the holiday — which was extended to help slow the coronavirus outbreak — comes to an end in the capital. The city is preparing for a potential increase in infections.

American schools are advising students to avoid travel to China, and some are working to evacuate students already there. The U.S. issued a "Do Not Travel" advisory for China on Thursday.

Transportation in and out of the city of 11 million is being shut down as cases of the coronavirus are being reported throughout China and abroad. Wuhan is believed to be the contagion's epicenter.