Aerial photo taken on Nov. 25, 2019 shows part of the snow-covered Qinling Mountains in Xi'an, northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

When the iconic mountains encounter snow.

XI'AN, Nov. 26, 2019 (Xinhua) -- With the main parts located in northwest China's Shaanxi Province, the Qinling Mountains are the natural boundary between north and south China. The mountains, which divide northern temperate zones from subtropical zones in the country, are also one of the biodiversity hotspots worldwide.

Aerial photo taken on Nov. 25, 2019 shows part of the snow-covered Qinling Mountains in Xi'an, northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

Aerial photo taken on Nov. 25, 2019 shows part of the snow-covered Qinling Mountains in Xi'an, northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

Aerial photo taken on Nov. 25, 2019 shows part of the snow-covered Qinling Mountains in Xi'an, northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

Aerial photo taken on Nov. 25, 2019 shows part of the snow-covered Qinling Mountains in Xi'an, northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

Aerial photo taken on Nov. 25, 2019 shows part of the snow-covered Qinling Mountains in Xi'an, northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

Aerial photo taken on Nov. 25, 2019 shows part of the snow-covered Qinling Mountains in Xi'an, northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

Aerial photo taken on Nov. 25, 2019 shows part of the snow-covered Qinling Mountains in Xi'an, northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

Aerial photo taken on Nov. 25, 2019 shows part of the snow-covered Qinling Mountains in Xi'an, northwest China's Shaanxi Province. (Xinhua/Liu Xiao)