A child plays with snow at a snow-covered park in Frankfurt, Germany, Jan. 17, 2021. A snowfall hit Frankfurt on Sunday. (Xinhua/Lu Yang)

A child sleds at a snow-covered park in Frankfurt, Germany, Jan. 17, 2021. A snowfall hit Frankfurt on Sunday. (Xinhua/Lu Yang)

People make a snowman at a snow-covered park in Frankfurt, Germany, Jan. 17, 2021. A snowfall hit Frankfurt on Sunday. (Xinhua/Lu Yang)

A child runs at a snow-covered park in Frankfurt, Germany, Jan. 17, 2021. A snowfall hit Frankfurt on Sunday. (Xinhua/Lu Yang)

A child makes a snowman at a snow-covered park in Frankfurt, Germany, Jan. 17, 2021. A snowfall hit Frankfurt on Sunday. (Xinhua/Lu Yang)