Aerial photo taken on Sept. 2, 2021 shows the twisting mountain road of Longtoushan scenic area in Nanzheng District of Hanzhong, northwest China's Shaanxi Province. (Xinhua/Tao Ming)

Photo taken on Sept. 2, 2021 shows the wild hawthorn trees growing in Longtoushan scenic area in Nanzheng District of Hanzhong, northwest China's Shaanxi Province. (Xinhua/Tao Ming)

Photo taken on Sept. 2, 2021 shows the scenery of Longtoushan scenic area shrouded in fog in Nanzheng District of Hanzhong, northwest China's Shaanxi Province. (Xinhua/Tao Ming)

Aerial photo taken on Sept. 2, 2021 shows the scenery of Longtoushan scenic area shrouded in clouds in Nanzheng District of Hanzhong, northwest China's Shaanxi Province. (Xinhua/Tao Ming)

Aerial photo taken on Sept. 2, 2021 shows the cableway carrying tourists in Longtoushan scenic area in Nanzheng District of Hanzhong, northwest China's Shaanxi Province. (Xinhua/Tao Ming)

Aerial photo taken on Sept. 2, 2021 shows the scenery of Longtoushan scenic area shrouded in clouds in Nanzheng District of Hanzhong, northwest China's Shaanxi Province. (Xinhua/Tao Ming)

Aerial photo taken on Sept. 2, 2021 shows the scenery of Longtoushan scenic area shrouded in clouds in Nanzheng District of Hanzhong, northwest China's Shaanxi Province. (Xinhua/Tao Ming)