Tourists take photos at Jingshan Park in Beijing on March 1, 2020. (WU XIAOHU / CHINADAILY.COM.CN)

People exercise at Tiantan (Temple of Heaven) Park in Beijing on March 5, 2020. (ZOU HONG / CHINADAILY.COM.CN)

Tourists wearing masks walk in Jingshan Park in Beijing on March 10, 2020. (WEI XIAOHAO / CHINADAILY.COM.CN)

Two children ride balance bikes at Beihai Park in Beijing on March 10, 2020. (WEI XIAOHAO / CHINADAILY.COM.CN)

A woman plays diabolo at Jingshan Park in Beijing on March 10, 2020. (WEI XIAOHAO / CHINADAILY.COM.CN)

A photo taken on March 10 shows a visitor in Beihai Park in Beijing. (WEI XIAOHAO / CHINADAILY.COM.CN)