Which country is home to the longest canal in the world?

The Grand Canal nominally runs between Beijing and Hangzhou over a total length of 1,794 km (1,115 mi); however, only the section from Hangzhou to Liangshan County is currently navigable. Its course is today divided into seven sections. From south to north these are the Jiangnan Canal, the Li Canal, the Inner Canal, the Middle Canal, the Lu Canal, the South Canal, the North Canal, and the Tonghui River.

The oldest sections of what is now the Grand Canal were completed in the early 5th century BC to provide supply routes for the states of Wu and Yue during the conflicts of China's Spring and Autumn Period.