Li Bing and his son requisitioned 200,000 laborers in the land of Bashu, and at the same time requisitioned 200,000 stone grain and grass to build Dujiangyan. Although the Huaiguo Labor Levy did not pay wages, it was full of food. At the same time, labor will be levied during the agricultural slack period, and the local people will be punished for their labor during the busy agricultural season. Except, of course, in the event of war or geological disasters.

Because the people of Shuzhong were deeply affected by the flooding of the Minjiang and Tuojiang rivers, they were very happy after hearing that the Huai State was going to control the floods, and soon the 200,000 laborers were requisitioned.

And Li Bing's father and son have personally walked and surveyed all over Shuzhong during this time, and have also won the recognition of many people.

Because the construction of Dujiangyan is a huge water conservancy project, in addition to these people, a large number of craftsmen are needed. After all, many projects are directed by craftsmen. Li Bing specially admonished Wang Xu and asked for 300 craftsmen to be recruited from the craftsman supervisor to help build Dujiangyan. Wang Xu was very supportive of the construction of Dujiangyan, and it didn't take long for the craftsman to send 500 craftsmen to come.

After everything was ready, the water conservancy project was officially launched. According to Li Bing's plan, they needed to dig a gap in the mountains and rivers on the north bank of the Minjiang River, so that the water of the Minjiang River could flow out of the gap. At the same time, with the help of the Minjiang Jiangxin Island, the Minjiang River is diverted.

Li Bing led people to strengthen and raise the Minjiang River and dredge the downstream river. The most important thing is to divert the water of the Minjiang River through a series of ditches, and then the diverted river water is introduced into the Chengdu Plain through the ditches, or for drinking or irrigation.

Because of the special geographical environment of the Minjiang River, Li Bing took sand and stones to build an embankment on the Jiangxin Island in the middle of the river, building an arc-shaped bend to divide the river into two rivers. In this way, the Min River is divided into four or six. When there is no flood, the water of the Min River passes through the inner river, and when there is a flood, the river water passes through the outer river, reducing the pressure on the inner river.

The whole project is very difficult, such as digging the gap on Yulei Mountain, the Yulei Mountain residual vein stone is as hard as iron, the craftsmen use the method of fire boiling water, spend a lot of manpower and material resources, only then will a section of the mountain dig a gap of more than 20 meters, the mountain range is cut off.

In order to build a on Jiangxin Island, Li Bing made a pestle from local materials, and made a bamboo cage out of bamboo, which was filled with stones to strengthen the embankment. This method of using local materials not only reduces the difficulty of the construction of Dujiangyan, but also facilitates the repair. Every year when the dry season comes, the damaged areas can be replaced.

At the same time as the construction of Dujiangyan, Li Bing and his son also built an aqueduct at the same time, which was like a spider's web, dividing the Chengdu Plain into small pieces, and the water of the Minjiang River was also diverted into the Chengdu Plain by these countless ditches to irrigate the land.

The entire Dujiangyan project is very huge, and there is a time limit for the labor transferred by Huaiguo, and when the time is up, it will leave, and then other people will be conscripted to serve. Even during the busy farming period, Dujiangyan still needs to stop work. The entire construction site will maintain more than 100,000 people all year round.

The construction time span of Dujiangyan is very long, and Huaiguo needs to invest a lot of grain and grass every year. However, although the construction was not completed, the aqueduct built by Li Bing and his son can already divide water for irrigation, so that a lot of land on the Chengdu Plain has been irrigated.

After seeing the success of the canal, the people of Shuzhong were even more confident and more supportive of the construction of Dujiangyan. After seeing the benefits, many large families and local wealthy families in Chengdu donated food and materials one after another.

After the completion of this Dujiangyan, the benefits to them are greater, which of the wealthy families in these places is not thousands of acres of land, although on the surface it has been separated, and the operation alone knows how to move.

With so much land irrigated, the annual increase in grain is not a small amount, and these people are very well divided into a small amount of grain and a stable source of water to increase grain production.

With the strong support of Huaiguo, the project of Dujiangyan took thirteen years and was finally completed. The completion of Dujiangyan also minimized the flooding of the land of Bashu, the original turbulent water of the Minjiang River, successfully tamed by humans, and the situation of "people or fish and turtles" gradually disappeared, writing a new chapter of human taming nature.

After the completion of Dujiangyan, the flood in the Bashu land was reduced by 70 percent, and the probability of drought was also reduced by 50 percent. And because of the Dujiangyan irrigation canal, even if there is a drought, the Chengdu area will not be affected.

The Dujiangyan project took hundreds of thousands of people and took 13 years to complete, and at its peak, there were more than 200,000 people working on the entire construction site, consuming millions of stones of grain and grass. But the harvest is also satisfactory, this water conservancy project has allowed millions of acres of grain fields in the Chengdu Plain to be irrigated. History: 'The people live in peace, the characters Yin Fu, all industries are prosperous, the year is rich, the fertile fields are thousands of miles, and the country of abundance is rich. ’

[Your descendants appointed Li Bing and his son to preside over the construction of the Dujiangyan Flood Control and Irrigation Water Conservancy Project, which is the world's earliest and largest water diversion project without dams, writing a new chapter for human beings to transform nature, and you have gained a lot of luck. 】

In the first year after the completion of the construction of the Dujiangyan irrigation system, the heavy rain in Bashu, the water potential of the Minjiang River and the Tuojiang River soared, the surging river water was successfully diverted in Dujiangyan, and the surging river water was separated by the fish mouth, and then the river water was successfully diverted to the irrigation canal through the inner and outer rivers, and the original violent river water was tamed here.

The whole of Shu was not affected by the flood, and the Chengdu Plain was rich in grain, the grain was piled up like a mountain, and the people were solid.

Jinling, Qianyuan Palace.

Wang Xu looked at the report about Shu in his hand, and the grain output of the land of Bashu had surpassed that of the Nanyang Plain, second only to the Huaihe Plain. You must know that the Huaihe Plain has only reached this level after hundreds of years of development in the Huai Kingdom, and how long has the land of Bashu been developed. Sufficient food, the flood was controlled, and the population of Bashu ushered in explosive growth.

The land of Bashu is already qualified to become another grain and population base of Huai.

At the same time, Le Yi and Li Bing have carried out reforms and water conservancy construction projects in the land of Bashu for more than ten years, and they have also completely sorted out the land of Bashu from top to bottom. Five years after Le Yi was in Pingbashu, he was promoted to the prime minister of Huaiguo, and at the same time he was named the monarch of Anguo, and his wife was named Mrs. Anguo.

It is not a good thing to let Le Yi stay in the land of Bashu for a long time, Wang Xu will never test people's hearts, and after Le Yi was promoted to Xiangguo, Xu Chao was appointed as the county guard of Shu County, and continued to cooperate with Li Bing. The land of Bashu was also completely controlled by the Huai State.

Dujiangyan is the oldest in the world today, and it is also the damless water conservancy irrigation project that has been used for two thousand years, it skillfully uses the surrounding mountains and rivers topography, and makes this set of water conservancy facilities have the system functions of water distribution, irrigation, flood control, sand discharge, etc., the most amazing thing is that it does not cut off the water source, destroys the natural environment, realizes the harmonious coexistence of human beings and nature, and is worthy of learning from our descendants.

Dujiangyan is a national key cultural relics protection unit, and has been included in the world cultural heritage, world natural heritage, and world irrigation heritage. - Grade 8 History Book - Ancient Chinese History

It is hard to imagine that such a grand project as Dujiangyan is actually the work of the ancient Chinese more than 2,000 years ago, and the European civilization of the same period was still in the period of city-states, what is even more incomprehensible is that ancient Babylon and ancient Egypt are still building for the palaces and mausoleums of kings and pharaohs, while ancient China actually spent a lot of manpower and physics to provide convenience for civilians, perhaps this is one of the reasons why only China can continue among all ancient civilizations. -- General History of the World: History of Ancient China

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