A woman enters details into her health app after scanning a QR code at a checkpoint to the 798 art district in Beijing following the novel coronavirus disease (COVID-19) outbreak, China April 29, 2020. Picture taken April 29, 2020. REUTERS/Thomas Peter

A delivery driver presents the status of his health app to security at a checkpoint to the 798 art district in Beijing following the novel coronavirus disease (COVID-19) outbreak, China April 29, 2020. Picture taken April 29, 2020. REUTERS/Thomas Peter

A delivery driver holds up his smartphone to present the status of his health app to security at a checkpoint to the 798 art district in Beijing following the novel coronavirus disease (COVID-19) outbreak, China April 29, 2020. Picture taken April 29, 2020. REUTERS/Thomas Peter

A delivery driver has his temperature checked after presenting the status of his health app to security at a checkpoint to the 798 art district in Beijing following the novel coronavirus disease (COVID-19) outbreak, China April 29, 2020. Picture taken April 29, 2020. REUTERS/Thomas Peter

A delivery driver holds up his smartphone to present the status of his health app to security as the guard notes down his phone number at a checkpoint to the 798 art district in Beijing following the novel coronavirus disease (COVID-19) outbreak, China April 29, 2020. Picture taken April 29, 2020. REUTERS/Thomas Peter

A security guard holds up a QR code for a health app at a checkpoint to the 798 art district in Beijing following the novel coronavirus disease (COVID-19) outbreak, China April 29, 2020. Picture taken April 29, 2020. REUTERS/Thomas Peter

A CCTV security surveillance camera overlooks a street as a woman walks past following the spread of the novel coronavirus disease (COVID-19) in Beijing, China May 11, 2020. Picture taken May 11, 2020. REUTERS/Thomas Peter

Hikvision and Dahua CCTV security surveillance cameras overlook a street as a man cycles past following the spread of the coronavirus disease (COVID-19) in Beijing, China May 11, 2020. Picture taken May 11, 2020. REUTERS/Thomas Peter

CCTV security surveillance cameras overlook a street as a man walks past following the spread of the novel coronavirus disease (COVID-19) in Beijing, China May 11, 2020. Picture taken May 11, 2020. REUTERS/Thomas Peter

A CCTV security surveillance camera overlooks a street as people walk following the spread of the coronavirus disease (COVID-19) in Beijing, China May 11, 2020. Picture taken May 11, 2020. REUTERS/Thomas Peter

A CCTV security surveillance camera overlooks a street as people walk following the spread of the coronavirus disease (COVID-19) in Beijing, China May 11, 2020. Picture taken May 11, 2020. REUTERS/Thomas Peter

A CCTV security surveillance camera overlooks a street as a man walks past following the spread of the coronavirus disease (COVID-19) in Beijing, China May 11, 2020. Picture taken May 11, 2020. REUTERS/Thomas Peter

A CCTV security surveillance camera overlooks a street as a woman walks past following the spread of the novel coronavirus disease (COVID-19) in Beijing, China May 11, 2020. Picture taken May 11, 2020. REUTERS/Thomas Peter

A CCTV security surveillance camera overlooks a street as a man walks following the spread of the coronavirus disease (COVID-19) in Beijing, China May 12, 2020. Picture taken May 12, 2020. REUTERS/Thomas Peter