Tourists go sightseeing at Taiping National Forest Park in Xi'an, northwest China's Shaanxi Province, July 15, 2019. (Xinhua/Liu Xiao)

　　Aerial photo taken on July 15, 2019 shows the scenery of Taiping National Forest Park in Xi'an, northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

　　Aerial photo taken on July 15, 2019 shows the scenery of Taiping National Forest Park in Xi'an, northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

　　Aerial photo taken on July 15, 2019 shows the scenery of Taiping National Forest Park in Xi'an, northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

　　Tourists go sightseeing at Taiping National Forest Park in Xi'an, northwest China's Shaanxi Province, July 15, 2019. (Xinhua/Liu Xiao)