Photo taken on Jan. 4, 2021 shows light decorations at the Old Street area in Qilihe District of Lanzhou, northwest China's Gansu Province. (Xinhua/Ma Xiping)

Photo taken on Jan. 4, 2021 shows light decorations at the Old Street area in Qilihe District of Lanzhou, northwest China's Gansu Province. (Xinhua/Ma Xiping)

Aerial photo taken on Jan. 4, 2021 shows light decorations at the Old Street area in Qilihe District of Lanzhou, northwest China's Gansu Province. (Xinhua/Ma Xiping)

Aerial photo taken on Jan. 4, 2021 shows light decorations at the Old Street area in Qilihe District of Lanzhou, northwest China's Gansu Province. (Xinhua/Ma Xiping)

Photo taken on Jan. 4, 2021 shows light decorations at the Old Street area in Qilihe District of Lanzhou, northwest China's Gansu Province. (Xinhua/Ma Xiping)

Aerial photo taken on Jan. 4, 2021 shows light decorations at the Old Street area in Qilihe District of Lanzhou, northwest China's Gansu Province. (Xinhua/Ma Xiping)