Aerial photo taken on June 14, 2019 shows water pouring out of sluices of the Shuangpai Reservoir in Yongzhou, central China's Hunan Province. (Xinhua/He Hongfu)

Aerial photo taken on June 14, 2019 shows water pouring out of sluices of the Shuangpai Reservoir in Yongzhou, central China's Hunan Province. (Xinhua/He Hongfu)

Aerial photo taken on June 14, 2019 shows water pouring out of sluices of the Shuangpai Reservoir in Yongzhou, central China's Hunan Province. (Xinhua/He Hongfu)

Aerial photo taken on June 14, 2019 shows water pouring out of sluices of the Shuangpai Reservoir in Yongzhou, central China's Hunan Province. (Xinhua/He Hongfu)