It was recommended to the emperor that Jing Wong was very talented in water control. It was necessary to build a dredging canal at that time. Liu Zhuang, the emperor of the Eastern Han Dynasty, wrote a letter to Wang Jing, using the official name of Wu Wang to do it. Wang Wu adopted the tributary method of Wang Jing (flood control with stone overflow weir), which made the flood no longer a disaster. Previously, during the Liu Kan period of the Western Han Dynasty, the Yellow River and side canals burst their banks and were not rectified in time. 10, when the military was established in the Han Dynasty, Zhang Yun, the governor of Wu Yang, reported to the court: "The Yellow River has burst its banks for a long time, and the disaster is very serious. The flood of the economic canal flooded dozens of counties and cities. As long as you have the money to build a river, success is not difficult. The riverbank needs to be repaired so that people on both sides of the strait can live a stable life. " After reporting, Emperor Guangwu ordered governance. Just as the riverbank was about to be repaired, Jun Jun, the magistrate of Junyi County, said, "During the Yuan-light years of Emperor Wu of the Han Dynasty, people began to cultivate along the riverbank. However, the Ruzi River burst its banks and has been built for nearly 20 years, so that the river is no longer silted up. Now there are few people on both sides of the strait, and our land is rich and vast. Even if left untreated, the flood is tolerable. Besides, just after the war, adding corvee will make people more tired and complain. You should recuperate after a quiet life and repair the riverbank. " Guangwudi ordered to stop building the river bank. Later, the side canal burst eastward, and the flood was so great that the river banks were submerged in the flood. People in Anhui and Henan complained that the court only increased the burden on the people and did not solve their sufferings. 12 years, Emperor Han Yongping also discussed the management of side canals. He summoned Wang Jing and asked him about water conservancy. He went to the front of the temple and asked, "What do you think of the county magistrate Junyi's suggestion that there is no big loss if you don't build a culvert?" Wang Jingdao: "Your Majesty, please think about it. The canal river River Basin is very close to Luoyang, which is a great threat to the capital. More than a dozen counties nearby are rich in grain and cannot be ignored. Although the funds are huge, the people who serve it will complain, but after the completion, it will still benefit the people and the country, especially Luoyang. " Liu Zhuang thought that Wang Jing was right, and gave him many books on water conservancy geography, such as Yu Gong Tu, Shan Hai Jing, Shi Ji He Qu Shu, and money, and put him in charge of water conservancy. In the summer of the 13th year of Yongping, after Wang Jing visited the Yellow River several times, the branch canal regulation project began. This matter is not easy to handle. After the Bianqu burst, a wide Shui Ze formed on the Central Plains, which flowed through several counties in Shandong and Jiangsu and merged into the Huaihe River. Special terrain and environment make disasters frequent. After careful calculation, Wang Jing decided to change the outlet route of the side canal again, and let the river flow out from Liangshan County, Pingyang County, Changqing County, Jinan City, Jiyang County, gaoqing county County and Boxing County. Then, this is very close to the direction of the Yellow River today. The previous process was more tortuous than this. The biggest problem of Bianqu is the mouth of Xingyang Canal, which is a water diversion point, and a gate is needed to control the amount of water entering Bianqu. Jing Wong added stones to the dam and connected it with the Yellow River levee, leaving a gap more than ten feet wide and sticking it with wooden boards. This is the sluice. When there is more water, the gate will open and when there is less water, it will close. Then the route will be selected according to the mountain drop, so as to keep the water flow stable and avoid natural damage. Especially at sharp turns, stone dikes should be built, and then the silted place should be dug up and the land should be irrigated by tributaries. These measures have greatly eased the pressure on the Yellow River itself.
The cost of water control projects is staggering, with a total cost of tens of billions. The burden of the Han government is quite heavy, and Wang Jing saves everywhere, which is very easy. In April of the fourteenth year of Yongping, the side song was finally completed. In this year's bitter struggle, hundreds of thousands of people sweated for it, and many people gave their lives because of accidents. After releasing the water, the rolling Yellow River flowed smoothly into the branch canal, irrigated the fields on both sides, and was praised by the people. Liu Zhuang also happily came to Xingyang to inspect the side songs. When he saw the sluice designed by Wang Jing, he was deeply moved and said many words of encouragement. "The land on both sides of the Yellow River is cultivated by the poor, and officials and giants are not allowed to interfere." Liu Zhuang issued a document to boost morale and revitalize agriculture again. Since then, the land of dozens of counties flooded on both sides of the lower Yellow River has become fertile land, which has increased the income of the Han government and enriched the national treasury. Therefore, Wang Jing is known as the "Water Control Wonder", and the people respect him very much, and Liu Zhuang also trusts him. Judging from the history of water conservancy in the world, it is a miracle that a big project like harnessing the Yellow River can achieve such success under the condition of very backward productivity. Wang Jing is worthy of the title of "water control spectacle".