Photo taken on Jan. 24, 2021 shows a view of the snow-covered Cheshi Ancient Trail, a shortcut through the Tianshan Mountains that historically linked trade routes along the Silk Road, in northwest China's Xinjiang Uygur Autonomous Region. (Xinhua/Gao Han)

Aerial photo taken on Jan. 24, 2021 shows a view of the snow-covered Cheshi Ancient Trail, a shortcut through the Tianshan Mountains that historically linked trade routes along the Silk Road, in northwest China's Xinjiang Uygur Autonomous Region. (Xinhua/Ding Lei)

Aerial photo taken on Jan. 24, 2021 shows a view of the snow-covered Cheshi Ancient Trail, a shortcut through the Tianshan Mountains that historically linked trade routes along the Silk Road, in northwest China's Xinjiang Uygur Autonomous Region. (Xinhua/Ding Lei)

Photo taken on Jan. 24, 2021 shows a view of the snow-covered Cheshi Ancient Trail, a shortcut through the Tianshan Mountains that historically linked trade routes along the Silk Road, in northwest China's Xinjiang Uygur Autonomous Region. (Xinhua/Ding Lei)

Aerial photo taken on Jan. 24, 2021 shows a view of the snow-covered Cheshi Ancient Trail, a shortcut through the Tianshan Mountains that historically linked trade routes along the Silk Road, in northwest China's Xinjiang Uygur Autonomous Region. (Xinhua/Gao Han)

Aerial photo taken on Jan. 24, 2021 shows a view of the snow-covered Cheshi Ancient Trail, a shortcut through the Tianshan Mountains that historically linked trade routes along the Silk Road, in northwest China's Xinjiang Uygur Autonomous Region. (Xinhua/Ding Lei)

Aerial photo taken on Jan. 24, 2021 shows a view of the snow-covered Cheshi Ancient Trail, a shortcut through the Tianshan Mountains that historically linked trade routes along the Silk Road, in northwest China's Xinjiang Uygur Autonomous Region. (Xinhua/Gao Han)

Aerial photo taken on Jan. 24, 2021 shows a bird perching on a snow-covered tree branch by the Cheshi Ancient Trail, a shortcut through the Tianshan Mountains that historically linked trade routes along the Silk Road, in northwest China's Xinjiang Uygur Autonomous Region. (Xinhua/Ding Lei)

Aerial photo taken on Jan. 24, 2021 shows a view of the snow-covered Cheshi Ancient Trail, a shortcut through the Tianshan Mountains that historically linked trade routes along the Silk Road, in northwest China's Xinjiang Uygur Autonomous Region. (Xinhua/Ding Lei)

Aerial photo taken on Jan. 24, 2021 shows a view of the snow-covered Cheshi Ancient Trail, a shortcut through the Tianshan Mountains that historically linked trade routes along the Silk Road, in northwest China's Xinjiang Uygur Autonomous Region. (Xinhua/Gao Han)

Aerial photo taken on Jan. 24, 2021 shows a view of the snow-covered Cheshi Ancient Trail, a shortcut through the Tianshan Mountains that historically linked trade routes along the Silk Road, in northwest China's Xinjiang Uygur Autonomous Region. (Xinhua/Gao Han)

Aerial photo taken on Jan. 24, 2021 shows a view of the snow-covered Cheshi Ancient Trail, a shortcut through the Tianshan Mountains that historically linked trade routes along the Silk Road, in northwest China's Xinjiang Uygur Autonomous Region. (Xinhua/Ding Lei)