Aerial photo taken on Jan. 13, 2021 shows the snow scenery of Shenyang Imperial Palace in Shenyang, northeast China's Liaoning Province. Shenyang Imperial Palace was built in 1625 and had been used as the imperial palace in early Qing Dynasty (1616-1911). (Xinhua/Yao Jianfeng)

Photo taken on Jan. 13, 2021 shows a snowplow removing snow in the streets outside Shenyang Imperial Palace in Shenyang, northeast China's Liaoning Province. Shenyang Imperial Palace was built in 1625 and had been used as the imperial palace in early Qing Dynasty (1616-1911). (Xinhua/Yao Jianfeng)

Aerial photo taken on Jan. 13, 2021 shows the snow scenery of Shenyang Imperial Palace in Shenyang, northeast China's Liaoning Province. Shenyang Imperial Palace was built in 1625 and had been used as the imperial palace in early Qing Dynasty (1616-1911). (Xinhua/Yao Jianfeng)

Photo taken on Jan. 13, 2021 shows a worker sweeping the snow in Shenyang Imperial Palace in Shenyang, northeast China's Liaoning Province. Shenyang Imperial Palace was built in 1625 and had been used as the imperial palace in early Qing Dynasty (1616-1911). (Xinhua/Yao Jianfeng)

Aerial photo taken on Jan. 13, 2021 shows the snow scenery of Shenyang Imperial Palace in Shenyang, northeast China's Liaoning Province. Shenyang Imperial Palace was built in 1625 and had been used as the imperial palace in early Qing Dynasty (1616-1911). (Xinhua/Yao Jianfeng)