A woman wearing a protective face mask to help curb the spread of the new coronavirus waits for a delivery worker sorting out her parcel at a collection point outside an apartment in Beijing, Sunday, June 21, 2020. According to state media reports, nearly one hundred thousand delivery workers have to accept the nucleic acid testing, a countermeasure to prevent the spread of the virus in the capital city. (Photo by Andy Wong/AP Photo)





Visitors dressed in costumes take a selfie at Hong Kong's Disneyland on June 18, 2020, after the theme park officially reopened following nearly five months of closure in a fresh boost for a city that has largely managed to defeat the COVID-19 coronavirus. (Photo by Anthony Wallace/AFP Photo)





Xu Lei, head of JD Retail, second from left, sounds the gong to mark the listing of JD.com on the Hong Kong Stock Exchange at the JD.com headquarters in Beijing on Thursday, June 18, 2020. Chinese e-commerce firm JD.com's stock jumped nearly 6% on its debut in Hong Kong on Thursday after the firm raised $3.9 billion in a share sale. (Photo by Ng Han Guan/AP Photo)





A group of Yoga lovers perform yoga at Qingquan park, to celebrate International Day of Yoga on 21 June, Fengfeng District of Handan City, north China's Hebei Provine, 19 June 2020. (Photo by Rex Features/Shutterstock)





A passenger looks at a board with QR codes for health screening from different provinces at the Beijing Capital Airport terminal 2 in Beijing on Wednesday, June 17, 2020. The Chinese capital on Wednesday canceled more than 60% of commercial flights and raised the alert level amid a new coronavirus outbreak, state-run media reported. (Photo by Ng Han Guan/AP Photo)





A man holds a child wearing masks to curb the spread of the coronavirus in Beijing on Wednesday, June 17, 2020. (Photo by Ng Han Guan/AP Photo)





A student walks by security guard as she leaves from a school after classes were cancelled in Beijing on Wednesday, June 17, 2020. On Wednesday, the city of 20 million people raised its threat level from 3 to 2, leading to the cancellation of classes, suspended reopenings and stronger requirements for social distancing. (Photo by Ng Han Guan/AP Photo)





A woman wearing a face mask to curb the spread of the coronavirus takes the opportunity to sell umbrellas as it rains in Beijing on Thursday, June 18, 2020. A new coronavirus outbreak in Beijing saw a decline in daily cases Thursday while the United States increased pressure on China's leaders to reveal what they know about the pandemic. (Photo by Ng Han Guan/AP Photo)





Staff members wearing face masks and 3D glasses as they demonstrate the social distancing in the theatre during a media tour at the Hong Kong's Disneyland on Wednesday, June 17, 2020, a day before the theme park reopen after nearly four months of closure due to the coronavirus pandemic. (Photo by Kin Cheung/AP Photo)





People wearing protective gear are pictured inside the terminal at Beijing's international airport on June 17, 2020. Beijing's airports cancelled more than 1,200 flights and schools in the Chinese capital were closed again on June 17 as authorities rushed to contain a new coronavirus outbreak linked to a wholesale food market. (Photo by AFP Photo/China Stringer Network)





People walk to go into a makeshift testing center to receive nucleic acid tests after a new outbreak of the coronavirus disease (COVID-19) in Beijing, China, June 18, 2020. (Photo by Thomas Peter/Reuters)





A woman wearing a mask to curb the spread of the new coronavirus rides an electric bike on the streets of Beijing on Friday, June 19, 2020. China declared a fresh outbreak in Beijing under control after numbers for new cases stabilized as hundreds of thousands are tested. (Photo by Ng Han Guan/AP Photo)





Deliverymen collect food orders in Beijing on Friday, June 19, 2020. China declared a fresh outbreak in Beijing under control after numbers for new cases stabilized as hundreds of thousands are tested. (Photo by Ng Han Guan/AP Photo)





A woman and a child wear masks to curb the spread of the coronavirus as they use a net to look for fish along a canal in Beijing Saturday, June 20, 2020. China's capital recorded a further drop in coronavirus cases amid tightened containment measures. (Photo by Ng Han Guan/AP Photo)





Workers wearing protective suits spray disinfectant at Beijing Railway Station on June 18, 2020 in Beijing, China. (Photo by Jian Tianyong/China News Service via Getty Images)





Armed police officers and soldiers carry out the training of pushing logs in the sea. Qinzhou, Guangxi, China, June 16, 2020. (Photo by Costfoto/Barcroft Media via Getty Images)





An art installation of “dinosaur” is seen on June 16, 2020 in Shanghai, China. (Photo by Wang Gang/VCG via Getty Images)





People wait outside a COVID-19 testing site after they were ordered by the government to be tested after potentially being exposed to the coronavirus outbreak at a wholesale food market in Beijing, Wednesday, June 17, 2020. As the number of cases of COVID-19 in Beijing climbed in recent days following an outbreak linked to a wholesale food market, officials announced they had identified hundreds of thousands of people who needed to be tested for the coronavirus. (Photo by Mark Schiefelbein/AP Photo)





A woman visits a lavender field in Huocheng County, northwest China's Xinjiang Uygur Autonomous Region, June 16, 2020. WIth a cultivated area of 56,000 mu (about 3,733 hectares), the lavender industry of Huocheng County has created more than 15,000 jobs in 2019, with a yearly output value of about 1.5 billion yuan (about 212 million U.S. dollars). (Photo by Xinhua News Agency/Rex Features/Shutterstock)





Dressed in ancient Chinese clothes, children at a local kindergarten dance and make traditional perfumed medicine bag to celebrate the upcoming Dragon Boat Festival, Ganyu district, Lianyungang city, east China's Jiangsu province, 19 June 2020. (Photo by Imaginechina via AP Images)