Aerial photo taken on Jan. 24, 2021 shows the snow scenery of the Yellow River in Lanzhou, northwest China's Gansu Province.

Aerial photo taken on Jan. 24, 2021 shows the snow-covered Zhongshan Bridge in Lanzhou, northwest China's Gansu Province. (Photos: Xinhua)

Aerial photo taken on Jan. 24, 2021 shows a snow-covered sculpture in Lanzhou, northwest China's Gansu Province.

Aerial photo taken on Jan. 24, 2021 shows the snow scenery of the Yellow River in Lanzhou, northwest China's Gansu Province.

Aerial photo taken on Jan. 24, 2021 shows the snow scenery of the Yellow River in Lanzhou, northwest China's Gansu Province.

Aerial photo taken on Jan. 24, 2021 shows the snow scenery of the Yellow River in Lanzhou, northwest China's Gansu Province.

Aerial photo taken on Jan. 24, 2021 shows the snow-covered Zhongshan Bridge in Lanzhou, northwest China's Gansu Province.