Aerial photo taken on May 10, 2020 shows a view of the Three Gorges Dam in early morning after a rain in central China's Hubei Province. (Photo by Wang Gang/Xinhua)

Aerial photo taken on May 10, 2020 shows a view of the Three Gorges Dam in early morning after a rain in central China's Hubei Province. (Photo by Zheng Jiayu/Xinhua)

Aerial photo taken on May 10, 2020 shows a view of the Three Gorges Dam in early morning after a rain in central China's Hubei Province. (Photo by Zheng Jiayu/Xinhua)

Aerial photo taken on May 10, 2020 shows a vessel sailing on the Zigui section of the Three Gorges Reservoir region in early morning in central China's Hubei Province. (Photo by Wang Huifu/Xinhua)

Aerial photo taken on May 10, 2020 shows vessels sailing towards the five-tier ship lock at the Three Gorges Dam in central China's Hubei Province. (Photo by Wang Gang/Xinhua)

Aerial photo taken on May 10, 2020 shows a view of the Three Gorges Dam in early morning after a rain in central China's Hubei Province. (Photo by Zheng Jiayu/Xinhua)