Aerial photo taken on June 23, 2020 shows a view of the Xiaolangdi Reservoir on the Yellow River in central China's Henan Province. (Photos: Xinhua)

Aerial photo taken on June 23, 2020 shows a view of the Xiaolangdi Reservoir on the Yellow River in central China's Henan Province.

Aerial photo taken on June 23, 2020 shows a view of the Xiaolangdi Reservoir on the Yellow River in central China's Henan Province.

Aerial photo taken on June 23, 2020 shows a view of the Xiaolangdi Reservoir on the Yellow River in central China's Henan Province.

Aerial photo taken on June 23, 2020 shows a view of the Xiaolangdi Reservoir on the Yellow River in central China's Henan Province.

Aerial photo taken on June 23, 2020 shows a view of the Xiaolangdi Reservoir on the Yellow River in central China's Henan Province.