Qin Shihuang built the Great Wall, which was mainly used to resist the defensive facilities of Xiongnu, that is, the base for expedition to desert logistics. There is a saying that you can't call the Great Wall a true man. At that time, the education level and economic conditions were very poor. In that environment, Qin Shihuang could think of building the Great Wall, and he was really a great king. In fact, from this perspective, Qin Shihuang really thought of the invasion of Xiongnu, who was really fierce at that time. Protect your territory and build a defense network.
The main project of Lingqu is what we usually call waterway. When attacking Lingnan, a canal was dug to facilitate the transportation of rations. Lingqu has always been an important channel for waterway transportation between Lingnan and the Central Plains, and it has been repaired, maintained and expanded for more than two thousand years. Lingqu plays an important role in strengthening the political, economic and cultural ties between North and South and promoting local economic development. Control the water level of the river. As soon as the ship enters the gate, it will close the gate to raise the water level and let the ship go up step by step, from Lijiang to Xiangjiang, or from Xiangjiang to Lijiang. In this way, the rations and materials needed by Qin Jun can be supplemented through Lingqu.
We often hear that if you want to get rich, you must have access and the road will pass. It seems that Qin Shihuang already had such consciousness. The idea of the ancients really amazed us!