There is a local proverb saying: "Karez is our life. Without karez, there would be no Turpan, nor would there be an oasis civilization in Turpan."
For centuries, the wisdom behind the design of the wells ensured the people of Xinjiang remained well nourished. However, in the 1980s, the growth in demand for agricultural irrigation and the increasing usage of pumping wells lowered the water table and dried out the karez wells.