People enjoy sunshine at a park in Frankfurt, Germany, Jan. 10, 2021. (Xinhua/Lu Yang)
People enjoy sunshine at a park in Frankfurt, Germany, Jan. 10, 2021. (Xinhua/Lu Yang)
People enjoy sunshine at a park in Frankfurt, Germany, Jan. 10, 2021. (Xinhua/Lu Yang)
A woman enjoys sunshine at a park in Frankfurt, Germany, Jan. 10, 2021. (Xinhua/Lu Yang)
A child plays on a sunny day at a park in Frankfurt, Germany, Jan. 10, 2021. (Xinhua/Lu Yang)