Aerial photo taken on Oct. 31, 2019 shows the scenery of Shaohua Mountain in northwest China's Shaanxi Province. (Photo: Xinhua)

Aerial photo taken on Oct. 31, 2019 shows the scenery of Shaohua Mountain in northwest China's Shaanxi Province. (Photo: Xinhua)

Aerial photo taken on Oct. 31, 2019 shows the scenery of Shaohua Mountain in northwest China's Shaanxi Province. (Photo: Xinhua)

Aerial photo taken on Oct. 31, 2019 shows the scenery of Shaohua Mountain in northwest China's Shaanxi Province. (Photo: Xinhua)

Aerial photo taken on Oct. 31, 2019 shows the scenery of Shaohua Mountain in northwest China's Shaanxi Province. (Photo: Xinhua)

Aerial photo taken on Oct. 31, 2019 shows the scenery of Shaohua Mountain in northwest China's Shaanxi Province. (Photo: Xinhua)

Aerial photo taken on Oct. 31, 2019 shows the scenery of Shaohua Mountain in northwest China's Shaanxi Province. (Photo: Xinhua)

Aerial photo taken on Oct. 31, 2019 shows the scenery of Shaohua Mountain in northwest China's Shaanxi Province. (Photo: Xinhua)

Aerial photo taken on Oct. 31, 2019 shows the scenery of Shaohua Mountain in northwest China's Shaanxi Province. (Photo: Xinhua)