It can be said that after Qin Shihuang unified the six northern countries in 22 1 year BC, he launched a large-scale military conquest of Baiyue in Zhejiang, Fujian, Guangdong and Guangxi in 21year BC. Qin Jun won victory after victory on the battlefield, but struggled in Guangdong and Guangxi for three years without any achievements. It turned out that the topography of Guangxi caused the lack of transportation and supplies. Therefore, improving and ensuring transportation supply has become the key to the success or failure of this war. Qin Shihuang strategized and ordered Shilu to split the mountain and dig a canal. Shilu finally dug a canal in Xing 'an through accurate calculation, which miraculously connected the Yangtze River system with the Pearl River system, so that reinforcements and materials were continuously transported to the front line, which promoted the development of the war, and finally formally incorporated the vast area of Lingnan into the territory of the Central Plains Dynasty, which played an important role in Qin Shihuang's unification of China.

However, we cannot overemphasize the unilateral role. If we adopt a gradual strategy later, we can conquer Baiyue in time. However, this is not worth the loss, because Baiyue was a wasteland in ancient times and could not bring great benefits. Therefore, a protracted war is not desirable, and building a Lingqu has become the best practice.