Aerial photo taken on Dec. 9, 2019 shows the Shahe aqueduct of the middle route of China's south-to-north water diversion project in central China's Henan Province. (Xinhua/Feng Dapeng)

Aerial photo taken on Dec. 9, 2019 shows the Shahe aqueduct of the middle route of China's south-to-north water diversion project in central China's Henan Province. (Xinhua/Feng Dapeng)

Aerial photo taken on Dec. 9, 2019 shows the Shahe aqueduct of the middle route of China's south-to-north water diversion project in central China's Henan Province. (Xinhua/Feng Dapeng)

Aerial photo taken on Dec. 9, 2019 shows the Shahe aqueduct of the middle route of China's south-to-north water diversion project in central China's Henan Province. (Xinhua/Feng Dapeng)

Aerial photo taken on Dec. 9, 2019 shows the Shahe aqueduct of the middle route of China's south-to-north water diversion project in central China's Henan Province. (Xinhua/Feng Dapeng)

Aerial photo taken on Dec. 9, 2019 shows the Shahe aqueduct of the middle route of China's south-to-north water diversion project in central China's Henan Province. (Xinhua/Feng Dapeng)

Aerial photo taken on Dec. 9, 2019 shows the Shahe aqueduct of the middle route of China's south-to-north water diversion project in central China's Henan Province. (Xinhua/Feng Dapeng)

Aerial photo taken on Dec. 9, 2019 shows the Shahe aqueduct of the middle route of China's south-to-north water diversion project in central China's Henan Province. (Xinhua/Feng Dapeng)

Aerial photo taken on Dec. 9, 2019 shows the Shahe aqueduct of the middle route of China's south-to-north water diversion project in central China's Henan Province. (Xinhua/Feng Dapeng)