Lingqu Canal (Simplified Chinese:灵渠，Traditional Chinese:靈渠, pinyin: Líng Qǘ) is near Guilin, located in Xing'an county in Guangxi, China.
In 214 B.C, Qin Shi Huang, the First Emperor of the Qin Dynasty (221-206 B.C.), ordered the construction of a canal connecting the Xiang and Lijiang rivers. It is one of the three big water conservation projects of ancient China and the oldest existing canal in the world.
The three big water conservation projects in ancient China are: