Visitors wearing face masks look at the painting Mona Lisa at the Louvre Museum on its reopening day in Paris on July 6, 2020. After three and a half months of closure, the Louvre, one of the most visited museums in the world, reopened on Monday to the public, without the lengthy queues it saw before the COVID-19 pandemic. [Photo/Xinhua]

A photo taken on July 6, 2020 shows a container train from China's Wuhan entering a railway station in Kiev, Ukraine. The first direct container train, which left the central Chinese city of Wuhan on June 16, arrived in Kiev Monday, opening up new opportunities for China-Ukraine cooperation, Ukrainian officials said. [Photo/Xinhua]

New York City Mayor Bill de Blasio, his wife Chirlane Irene McCray and Reverend Al Sharpton paint "Black Lives Matter" along 5th avenue with others outside Trump Tower in the Manhattan borough of New York City on July 9, 2020. [Photo/Agencies]

A woman smells the flowers at a botanical garden in Minsk, Belarus on July 11, 2020. [Photo/Xinhua]

People mourn Seoul Mayor Park Won-soon at Seoul National University Hospital on July 10, 2020. The 64-year-old mayor was found dead in the woods of Mount Bugak near his residence around midnight Friday local time. No sign of foul play was found, but police are investigating the exact cause of his death. [Photo/Xinhua]

Overheated, a healthcare worker takes a break as people wait in their vehicles in long lines for coronavirus testing in Houston, Texas, US on July 7, 2020. [Photo/Agencies]

Paolo Gentiloni, European Commissioner for Economy, attends a press conference on the Summer 2020 Economic Forecast at the European Commission headquarters in Brussels, Belgium on July 7, 2020. The European economy will face a "deeper recession" than previously predicted due to the prolonged containment measures against COVID-19, the European Commission said in its Summer 2020 Economic Forecast on Tuesday. [Photo/Xinhua]

Children play at a park in front of the That Luang Stupa as coronavirus-related restrictions are eased in Vientiane, Laos on July 9, 2020. [Photo/Xinhua]

Brazil's President Jair Bolsonaro confirms his positive coronavirus diagnosis as he speaks to the media in Brasilia, Brazil on July 7, 2020. [Photo/Agencies]

A photo taken on July 9, 2020 shows a physical silver collector coin matched with the bank's digital collector coin LBCOIN to be issued on July 23, in Vilnius, Lithuania. An e-shop (lbcoin.lb.lt) has been launched on Thursday in Lithuania by the country's central bank, giving the green light to register to purchase the world's first blockchain-based digital collector coin LBCOIN. [Photo/Xinhua]

A bird lover trains parrots during a parrot-training show in Mubarak Al-Kabeer Governorate, Kuwait on July 9, 2020. [Photo/Xinhua]

Members of Surya Kirana dance group wear face shields to practice Javanese traditional dance amid the COVID-19 outbreak at Desa Seni in Beautiful Indonesia Miniature Park (TMII), Jakarta, Indonesia on July 11, 2020. Members of the dance group held weekly practices following health protocols after the TMII reopened to the public. [Photo/Xinhua]