Photo taken with a mobile phone shows a man exercising at a community in Beijing, capital of China, March 22, 2020. (Xinhua/Zhang Chuanqi)

Photo taken with a mobile phone shows people visiting the Tiantan (Temple of Heaven) Park in Beijing, capital of China, April 26, 2020. (Xinhua/Liu Hui)

Photo taken with a mobile phone shows empty compartments of Subway line 2 in Beijing, capital of China, March 7, 2020. (Xinhua/Li Jing)

Photo taken with a mobile phone shows a woman taking photos of a bullet train in Beijing, capital of China, May 18, 2020. (Xinhua/Wang Siwei)

Photo taken with a mobile phone shows a chef resting outside a food street in Beijing, capital of China, May 5, 2020. (Xinhua/Ding Hongfa)

Photo taken with a mobile phone shows a man riding a bike in Beijing, capital of China, March 15, 2020. (Xinhua/Li Jing)

Photo taken with a mobile phone shows a man walking along a river in Beijing, capital of China, April 23, 2020. (Xinhua/Meng Tao)

Photo taken with a mobile phone shows a woman riding a bike at a street in Beijing, capital of China, May 27, 2020. (Xinhua/Meng Tao)

Photo taken with a mobile phone shows a man resting against a bull statue in Beijing, capital of China, April 23, 2020. (Xinhua/Meng Tao)

Photo taken with a mobile phone shows a deliveryman waiting for people to collect packages in Beijing, capital of China, March 14, 2020. (Xinhua/Ding Hongfa)

Photo taken with a mobile phone shows a waitress working at a restaurant in Beijing, capital of China, May 8, 2020. (Xinhua/Xing Guangli)

Photo taken with a mobile phone shows people exercising at a community in Beijing, capital of China, March 24, 2020. (Xinhua/Zhang Chuanqi)

Photo taken with a mobile phone shows people visiting an exhibition at UCCA in Beijing, capital of China, May 20, 2020. (Xinhua/Zhang Manzi)