A snowman with a face mask is seen at a snow-covered park in Berlin, capital of Germany, Jan. 3, 2021. The first snow of this year in Berlin fell on Sunday. (Xinhua/Shan Yuqi)

A man pulls a sled with two children at a snow-covered park in Berlin, capital of Germany, Jan. 3, 2021. The first snow of this year in Berlin fell on Sunday. (Xinhua/Shan Yuqi)

A snowman is seen at a snow-covered park in Berlin, capital of Germany, Jan. 3, 2021. The first snow of this year in Berlin fell on Sunday. (Xinhua/Shan Yuqi)

A woman walks a dog at a snow-covered park in Berlin, capital of Germany, Jan. 3, 2021. The first snow of this year in Berlin fell on Sunday. (Xinhua/Shan Yuqi)