Lingqu

Xijiang), and thus is part of a historical waterway between the Yangtze and the Pearl River Delta. It was the first canal in the world to connect two river valleys and enabled boats to travel 2,000 kilometres (1,200 mi) inland from Beijing to Pearl River Delta.^[1] It is also one of the most well-preserved such projects in the world.^[2]

attack the Baiyue tribes in the south. The architect who designed the canal was Shi Lu (Chinese: 史祿). It is the oldest contour canal in the world,^[1] receiving its water from the Xiang. It was fitted with thirty-seven flash locks by 825 AD. There is a clear description of pound locks in the twelfth century, which were probably installed one or two centuries before.^[4] The canal also aided water conservation by diverting up to a third of the flow of the Xiang to the Li.^[3]

World Heritage Sites tentative list.^[3]