Aerial photo taken on Jan. 3, 2021 shows people skating on ice near Jiuzhan Park in Harbin, northeast China's Heilongjiang Province. (Photo by Zhang Tao/Xinhua)

A visitor skates on ice near Jiuzhan Park in Harbin, northeast China's Heilongjiang Province, Jan. 3, 2021. (Photo by Zhang Tao/Xinhua)

People skate on ice near Jiuzhan Park in Harbin, northeast China's Heilongjiang Province, Jan. 3, 2021. (Photo by Zhang Tao/Xinhua)