The world's most complex underground water conservancy project is located in China.

Built 2,000 years ago, it is hailed as the "Underground Great Wall," on par with the Grand Canal, and its contributions are comparable to the millennia-old Du jiang yan Irrigation System, having fed hundreds of millions of people. This is the Xinjiang Karez irrigation system, first built in the Han Dynasty. Completely hand-dug, it consists of four parts: vertical shafts, underground channels, open channels, and flood control dams, totaling approximately 1800 channels, crisscrossing the land like the blood vessels of the human body. It's truly hard to imagine how, in ancient times with limited technology and food shortages, workers managed to excavate this world-renowned miracle. The Karez system utilized groundwater seeping into the Turpan Basin from the melting snow of the Tianshan Mountains, forming underground rivers that irrigated oases, completely improving the harsh living conditions and solving the water problem for the people of Turpan. Such a feat is a testament to the greatness of Chinese laborers.

Видео The world's most complex underground water conservancy project is located in China. канала Tim Explores China