Tourists pose for photos at the 99 Dragon Pools scenic spot of Laojun Mountain National Park in Lijiang, southwest China's Yunnan Province, June 8, 2019. (Xinhua/Qin Qing)

Tourists view the scenery of 99 Dragon Pools scenic spot of Laojun Mountain National Park in Lijiang, southwest China's Yunnan Province, June 8, 2019. (Xinhua/Qin Qing)

Aerial photo taken on June 8, 2019 shows tourists viewing azalea blossoms at the 99 Dragon Pools scenic spot of Laojun Mountain National Park in Lijiang, southwest China's Yunnan Province. (Xinhua/Qin Qing)

Aerial photo taken on June 8, 2019 shows tourists viewing azalea blossoms at the 99 Dragon Pools scenic spot of Laojun Mountain National Park in Lijiang, southwest China's Yunnan Province. (Xinhua/Qin Qing)

Photo taken on June 8, 2019 shows the 99 Dragon Pools scenic spot of Laojun Mountain National Park in Lijiang, southwest China's Yunnan Province. (Xinhua/Qin Qing)

Aerial photo taken on June 8, 2019 shows the 99 Dragon Pools scenic spot of Laojun Mountain National Park in Lijiang, southwest China's Yunnan Province. (Xinhua/Qin Qing)