A famous South China quotation was "In the North there is the Great wall, in the South there is the Lingqu canal" (). In 214 BC the Emperor began the project of a major canal to transport supplies to the army. The canal allows water transport between north and south China. The canal, 34 kilometres in length, links the Xiang River which flows into the Yangtze and the Li Jiang, which flows into the Pearl River. The canal connected two of China's major waterways and aided Qin's expansion into the south-west. The construction is considered one of the three great feats of Ancient Chinese engineering, the others being the Great Wall and the Sichuan Dujiangyan Irrigation System.