Aerial photo taken on June 26, 2020 shows water gushing out from a sluiceway of the Liujiaxia Reservoir on the Yellow River in Linxia Hui Autonomous Prefecture, northwest China's Gansu Province. (Photo by Shi Youdong/Xinhua)

Aerial photo taken on June 26, 2020 shows water gushing out from a sluiceway of the Liujiaxia Reservoir on the Yellow River in Linxia Hui Autonomous Prefecture, northwest China's Gansu Province. (Photo by Shi Youdong/Xinhua)

Aerial photo taken on June 26, 2020 shows water gushing out from a sluiceway of the Liujiaxia Reservoir on the Yellow River in Linxia Hui Autonomous Prefecture, northwest China's Gansu Province. (Photo by Shi Youdong/Xinhua)

Aerial photo taken on June 26, 2020 shows water gushing out from a sluiceway of the Liujiaxia Reservoir on the Yellow River in Linxia Hui Autonomous Prefecture, northwest China's Gansu Province. (Photo by Shi Youdong/Xinhua)

Aerial photo taken on June 26, 2020 shows water gushing out from a sluiceway of the Liujiaxia Reservoir on the Yellow River in Linxia Hui Autonomous Prefecture, northwest China's Gansu Province. (Photo by Shi Youdong/Xinhua)

Aerial photo taken on June 26, 2020 shows water gushing out from a sluiceway of the Liujiaxia Reservoir on the Yellow River in Linxia Hui Autonomous Prefecture, northwest China's Gansu Province. (Photo by Shi Youdong/Xinhua)