1, the excavation of Lingqu connected Xiangjiang River and Lijiang River, and opened up the north-south water passage, which provided an important guarantee for the Qin Dynasty to unify Lingnan, so that a large amount of grain and grass could be transported to Lingnan by water to ensure adequate material supply.
2. Lingqu connects the Yangtze River and the Pearl River, forming a water transport network all over East China and South China, which is conducive to consolidating national unity, strengthening political, economic and cultural exchanges between North and South, and strengthening exchanges between people of all ethnic groups.
Extension:
Lingqu, called Qin-chiseled canal, Lingling canal, Douhe canal, Xing 'an canal and canal in ancient times, is a great project created by working people in ancient China. It is an ancient canal built by Qin Shihuang during his southern expedition, and has the reputation of "the pearl of ancient water conservancy architecture in the world".
Lingqu water system consists of north and south canals: the North Canal, commonly known as Xiangjiang New Road, is completely excavated manually, roughly parallel to the old Xiangjiang Road, with a total length of 3.25 kilometers; The South Canal starts from Nandoukou, passes through Yan Guan, flows to the mouth of Laojieling in Rongjiang Town and enters Lijiang River, with a total length of about 33.8+05km..