People wearing face masks to help curb the spread of the coronavirus gather near a giant TV screen broadcasting a news of Chinese President Xi Jinping speaks as he participates in a virtual G20 summit, at a shopping mall in Beijing, Sunday, November 22, 2020. The Group of 20 summit opened on Saturday with appeals by the world's most powerful leaders to collectively chart a way forward as the coronavirus pandemic overshadows this year's gathering, transforming it from in-person meetings to a virtual gathering of speeches and declarations. (Photo by Andy Wong/AP Photo)





People wearing face masks to protect against the coronavirus hold an umbrella as they walk through the first snowfall of the season in Beijing, Saturday, Nov. 21, 2020. China is starting mass testing on 3 million people in a section of the northern city of Tianjin and has tested thousands of others in a hospital in Shanghai after the discovery of a pair of cases there. (Photo by Mark Schiefelbein/AP Photo)





Buildings, vegetation and sculptures are covered with a thin layer of ice after snow, forming a beautiful scenery in Changchun city, northeast China's Jilin province, 19 November 2020. (Photo by Rex Features/Shutterstock)





Police officers of the entry-exit frontier inspection station wearing protective suits patrol at Qingdao Port on November 16, 2020 in Qingdao, Shandong Province of China. (Photo by Yu Fangping/VCG via Getty Images)





Police and security officers wearing face masks to help curb the spread of the coronavirus stand guard as masked airport workers wait for COVID-19 testings at the Shanghai Pudong International Airport in Shanghai, Monday, November 23, 2020. Chinese authorities are testing millions of people, imposing lockdowns and shutting down schools after multiple locally transmitted coronavirus cases were discovered in three cities across the country last week. (Photo by AP Photo/Stringer)





Contestants participate in a slackline contest in Zhangjiajie, in central China's Hunan province on November 16, 2020. (Photo by AFP Photo/China Stringer Network)





Snow falls at jinshanling Great Wall Scenic Area in Luanping County, Chengde City, North China's Hebei Province, November 19, 2020. (Photo by Costfoto/Barcroft Media via Getty Images)





This photo taken on November 18, 2020 shows people of the Miao ethnic minority in traditional costumes parading to celebrate the Miao new year festival in Leishan county, in China's southwestern Guizhou province. (Photo by AFP Photo/China Stringer Network)





In this November 17, 2020, photo released by China's Xinhua News Agency, a Long March-5 rocket is moved at the Wenchang Space Launch Site in Wenchang in southern China's Hainan Province. Chinese technicians were making final preparations Monday, Nov. 23, 2020, to launch a Long March-5 rocket carrying a mission to bring back material from the lunar surface in a potentially major advance for the country's space program. (Photo by Guo Cheng/Xinhua via AP Photo)





Staff of a local logistics center are busy at organizing goods, preparing to deliver them for customers who ordered during the Double 11, also known as the Singles' Day, an e-commerce shopping festival, Neijiang city, southwest China's Sichuan province, 15 November 2020. (Photo by Rex Features/Shutterstock)





People wearing face masks to help curb the spread of the coronavirus chat each other as a man performs morning exercise at a park in Beijing, Monday, November 23, 2020. (Photo by Andy Wong/AP Photo)





Women of Miao ethnic group wearing traditional costumes have a long table banquet to celebrate the Miao New Year on November 19, 2020 in Leishan County, Qiandongnan Miao and Dong Autonomous Prefecture, Guizhou Province of China. (Photo by Qiao Qiming/VCG via Getty Images)





Flowers are placed at a fire site, top center with broken windows, in Hong Kong Monday, November 16, 2020. City authorities said a fire in a crowded residential district in Hong Kong has “caused a number of deaths and injuries”. (Photo by Vincent Yu/AP Photo)





A couple wears masks to protect from the coronavirus as they visit a commercial district in Beijing on Friday, November 20, 2020. (Photo by Ng Han Guan/AP Photo)





Citizens wearing raincoats ride in the rain brought by typhoon Vamco on November 15, 2020 in Qionghai, Hainan Province of China. (Photo by Meng Zhongde/VCG via Getty Images)





Visitors enjoy the opening show of the Castle of Magical Dreams at Hong Kong Disneyland Resort, following the coronavirus disease (COVID-19) outbreak in Hong Kong, China on November 20, 2020. (Photo by Lam Yik/Reuters)





A worker wearing a protective suit gestures to a line of people at a COVID-19 testing site in Tianjin, China, Saturday, November 21, 2020. China is starting mass testing on 3 million people in a section of the northern city of Tianjin and has tested several thousand others in a hospital in Shanghai after the discovery of a pair of cases there. (Photo by Chinatopix via AP Photo)





This picture taken on November 13, 2020 shows shows an aerial view of the Bailong elevators in Zhangjiajie, China's Hunan province. Towering more than 300 metres (1,000 feet) up the cliff face that inspired the landscape for the blockbuster movie “Avatar”, the world's highest outdoor lift whisks brave tourists to breathtaking views. (Photo by Wang Zhao/AFP Photo)





Villagers celebrate their special New Year, known as the Gongbo New Year in Baji Village of Bayi District in Nyingchi, southwest China's Tibet Autonomous Region, November 18, 2020. The local people follow the tradition to celebrate the Gongbo New Year on Oct. 1 by the Tibetan calendar, which fell on Nov. 16 this year. On the morning of Gongbo New Year's day, each Tibetan family worships the goddess of the harvest, with gifts and wine. They also sing and dance during the ritual. According to a local legend, the tradition comes from an event in ancient times when a Tibetan ruler recruited the Gongbo tribe of the Nyingchi area to fight his enemies. The ruler brought the New Year's Day forward to Oct. 1, and ordered the soldiers to have a good celebration on the eve of the war so as to arouse their morale. This custom has been handed down since then. (Photo by Xinhua News Agency/Rex Features/Shutterstock)





In this undated photo, the aerial view of Jingxing Bridge in autumn is shown, with trees turning red around and the West Lake going under it, in Hangzhou city, east China's Zhejiang province on November 18, 2020. (Photo by Rex Features/Shutterstock)