This photo taken on Feb. 18, 2023 shows the construction site of an underground water-transfer tunnel in Danjiangkou, central China's Hubei Province. Started construction on Saturday, the tunnel is the main part of a project to channel water from the Three Gorges Reservoir area to the Hanjiang River, a tributary of the Yangtze River.

The project, started in July last year, is the first step of the follow-up construction of the country's South-to-North Water Diversion Project. Once completed, it is expected to enhance the water allocation capacity of the Hanjiang River Basin to further ensure water supply to the dry north. (Xinhua/Xiao Yijiu)

A worker operates a machine at the construction site of an underground water-transfer tunnel in Danjiangkou, central China's Hubei Province, Feb. 18, 2023. Started construction on Saturday, the tunnel is the main part of a project to channel water from the Three Gorges Reservoir area to the Hanjiang River, a tributary of the Yangtze River.

The project, started in July last year, is the first step of the follow-up construction of the country's South-to-North Water Diversion Project. Once completed, it is expected to enhance the water allocation capacity of the Hanjiang River Basin to further ensure water supply to the dry north. (Xinhua/Xiao Yijiu)

This aerial photo taken on Feb. 18, 2023 shows the construction site of an underground water-transfer tunnel in Danjiangkou, central China's Hubei Province. Started construction on Saturday, the tunnel is the main part of a project to channel water from the Three Gorges Reservoir area to the Hanjiang River, a tributary of the Yangtze River.

The project, started in July last year, is the first step of the follow-up construction of the country's South-to-North Water Diversion Project. Once completed, it is expected to enhance the water allocation capacity of the Hanjiang River Basin to further ensure water supply to the dry north. (Xinhua/Xiao Yijiu)

This aerial photo taken on Feb. 18, 2023 shows the construction site of an underground water-transfer tunnel in Danjiangkou, central China's Hubei Province. Started construction on Saturday, the tunnel is the main part of a project to channel water from the Three Gorges Reservoir area to the Hanjiang River, a tributary of the Yangtze River.

The project, started in July last year, is the first step of the follow-up construction of the country's South-to-North Water Diversion Project. Once completed, it is expected to enhance the water allocation capacity of the Hanjiang River Basin to further ensure water supply to the dry north. (Xinhua/Xiao Yijiu)

This aerial photo taken on Feb. 18, 2023 shows the construction site of an underground water-transfer tunnel in Danjiangkou, central China's Hubei Province. Started construction on Saturday, the tunnel is the main part of a project to channel water from the Three Gorges Reservoir area to the Hanjiang River, a tributary of the Yangtze River.

The project, started in July last year, is the first step of the follow-up construction of the country's South-to-North Water Diversion Project. Once completed, it is expected to enhance the water allocation capacity of the Hanjiang River Basin to further ensure water supply to the dry north. (Xinhua/Xiao Yijiu)