Aerial photo taken on June 18, 2020 shows the scenery of Xiaolangdi Reservoir on the Yellow River in central China's Henan Province. (Xinhua/Hao Yuan)

Aerial photo taken on June 18, 2020 shows the scenery of Xiaolangdi Reservoir on the Yellow River in central China's Henan Province. (Xinhua/Hao Yuan)

Aerial photo taken on June 18, 2020 shows the scenery of Xiaolangdi Reservoir on the Yellow River in central China's Henan Province. (Xinhua/Hao Yuan)

Aerial photo taken on June 18, 2020 shows the scenery of Xiaolangdi Reservoir on the Yellow River in central China's Henan Province. (Xinhua/Hao Yuan)

Aerial photo taken on June 18, 2020 shows the scenery of Xiaolangdi Reservoir on the Yellow River in central China's Henan Province. (Xinhua/Hao Yuan)

Aerial photo taken on June 18, 2020 shows the scenery of Xiaolangdi Reservoir on the Yellow River in central China's Henan Province. (Xinhua/Hao Yuan)