People walk on grass covered by snow at a park in Berlin, capital of Germany, March 30, 2020. (Xinhua/Shan Yuqi)

A man plays with a child on grass covered by snow at a park in Berlin, capital of Germany, March 30, 2020. (Xinhua/Shan Yuqi)

A woman walks at a park after snow in Berlin, capital of Germany, March 30, 2020. (Xinhua/Shan Yuqi)

A man rides a bicycle at a park after snow in Berlin, capital of Germany, March 30, 2020. (Xinhua/Shan Yuqi)