In fact, Jiang Zhiming didn't know that Li Yuanai had already given up on the southern section of Yongji Qu.

There is something called "doing things cannot be done". This broken thing is unforgivable.

The southern section of Yongji Canal has a complex terrain. The area into Huangkou is flowing from the Yellow River. Qinshui has flowed into many large ponds and accumulated mud and sand, so it is not suitable for digging the vast river channel that can pass through dragon boats.

Yang Guang did not listen to the persuasion of Jiang Jing, an expert, and insisted on digging out a river channel that could pass through dragon boats, which had damaged the surface ecology of the southern section of Yongji Canal.

Qinshui is prone to sand accumulation, and because the river channel is too wide, even the Yellow River flows backwards and mud and sand enter the Yongji Canal.

The value of canal transportation of this canal can be said to be gone.

Because you spent a lot of manpower and material resources to clear the river, all you received was a one or two year smooth transportation, which was meaningless.

Li Yuanai did not visit the southern section of Yongji Canal in person and did not see what the place was like with his own eyes. However, he knew that the Tang Dynasty had spent a hundred years thinking about it and studied the governance plan many times, but the discussion was too much, but it was unsuccessful. Finally, he decided to give up the southern section of Yongji Canal and change to the Danshui, Qingshui, and Qishui. In the northern section of Yongji Canal built by Yang Guang, a brand new Yongji Canal was formed.

At this point, the Yongji Canal became a crucial river canal connecting the north and south. During the Northern Song Dynasty, the new Yongji Canal was called the Yuhe River...

Regardless of the Tang and Song Dynasties, there was no need to repair and use the southern section of the Yongji Canal excavated by Yang Guang. It was precisely because of Huang and Qin River repeatedly silted, and no trace of the southern section of the Yongji Canal in the Sui Dynasty could be found.

Li Yuanai didn't feel that he could do something that could not be done in history for hundreds of years in just one year.

Therefore, he directly chose to give up here.

Doing it even though you know it is impossible, sometimes you are heroes, sometimes you are fools.

Going north along the canal, Li Yuanai entered the Yellow River and changed the route to Qishui. He took out the surrounding water network topography and said: "As far as I know, Cao Cao conquered Yuan Shang in the north and brought Qishui into Baigou to connect the grain channel. Later, he lived in Yecheng to connect Baigou and Qinghe. This time our inspection destination was not the southern section of Yongji Canal, but the old place of the grain channel left by Cao Cao."

As soon as Li Yuanai said, Jiang Zhiming realized it in his heart and said, "Is the king planning to give up the southern section of Yongji Qu?"

"What else?" Li Yuanai said: "When the situation in the southern section is constantly affected, you should know better than me. The broken things cannot be saved. Unless God blesses, the earth dragon will turn over again. How much do you think this probability is? Giving a river channel has been unseen for hundreds of years. We should not expect a miracle to happen."

Jiang Zhiming sighed deeply, and understood this truth in his heart, and did not force it.

The fleet turned around and followed Cao Cao's grain transport route in the past.

The flow of rivers will not be easily changed for thousands of years if it is not caused by human intervention or natural forced reversal.

Many of the Grand Canals built by Yang Guang also expanded from the ancient river channel.

After three or four hundred years, the former river site dug by Cao Cao remained there, and it was silently benefiting the people along the coast.

Li Yuanai and Jiang Zhiming stood at the bow of the ship and discussed the manpower, material and financial resources spent on changing the canal channel.

There is no doubt about whether it is feasible to divert the Yongji Canal.

Later generations have proved this point. Li Yuanai and Jiang Zhiming are both good at this. You can judge whether it is feasible just by using the water network diagram.

However, the key to the moment is not whether it is feasible or not, but whether it can be accomplished before Li Shimin sets the day to go to war.

If it cannot be successful, it will have no substantial meaning to change the way.

Li Yuanai also learned that Li Shimin had arranged for officials to transport the grain from Luokou Cang to the north.

Then the grain transport ship was blocked in the southern section of Yongji Canal and could not advance or retreat.

In a fit of anger, Li Shimin dismissed the tragic grain transport officer and investigated it.

Li Yuanai and Jiang Zhiming had been arriving in Guye City and had a clear understanding of the surrounding water nets.

Jiang Zhiming said: "The king chose nothing wrong. Weishui is indeed a river that is more suitable for connecting the Yongji Canal in addition to the fact that Weishui is more suitable for connecting to the Yongji Canal. Choosing Weishui can also use the Cao Cao's old road to greatly reduce the construction time and reduce the burden of corvee labor. However, Weishui is small, and the water flow will be insufficient. The advantages of Qinshui are difficult to compare with."

He still had some regrets and failed to make up for his ancestors' last wishes.

Li Yuanai said as if he was taking advantage of the situation: "Wei water is big and the heart is small. This time, we can not borrow Wei water, but we should keep the Wei water out of it, so as not to lose the main person. If the Wei water resources are not enough, we can spend time to slowly drain the flow, and we must never drink poison to quench thirst, and there will be endless troubles."

He said this without exaggeration.

Historically, the Tang Dynasty changed its route to Weishui as the southern section of Yongji Canal, achieving excellent results.

However, because the existence of Qinshui is ignored, the mud and sand of Qinshui often invade Weishui, causing considerable trouble for Weishui.

Therefore, Li Yuanai decided to do it once and for all this time and not give Qinshui a chance to invade.

Li Yuanai did not worry about the southern section of Yongji Canal, so he decisively chose to abandon it and re-determine the canal transportation route from the Wei River, saving a lot of time for the court.

September, the 17th year of Zhenguan.

Luoshui was successfully introduced from Rongkou to Bianshui.

The turbid Bian River was injected with clear Luo water, and the water quality was greatly improved. In just one month, there were signs of clearness.

What is crucial is that since then, the Bian River has bid farewell to the normal passage of two hundred days a year and has turned into an open passage throughout the year.

The Bian River has thus become the heart of the Grand Canal of the Sui and Tang Dynasties, and Bianzhou has made great conveniences and has become the largest material transfer center of the Tang Dynasty.

November, the 17th year of Zhenguan.

Under Yan Liben's supervision, nine ship locks, sixteen water inlet gates and eight water reduction gates were completed.

The ship lock dam perfectly solves the risks brought by the rapid water flow and the steep terrain on the canal. The water inlet and water reduction gates control the depth and height of the riverbed, artificially control the coming and going of water resources, and provide guarantees for the navigation of cargo ships.

June 23, the 18th year of Zhenguan.

With the concerted efforts of Li Yuanai and Jiang Zhiming, the southern section of Yongji Canal was changed, abandoned Qinshui and changed, and walked through the old path of Cao Cao's Baigou in the past and successfully changed the path.

July 1, the 18th year of Zhenguan.

Upon receiving the good news from Li Yuanai, Li Shimin immediately sent Hong, Rao and Jiang Sanzhou Navy, and drove 400 ships to transport military rations north, and conscripted the two prefectures of Youzhou and Yingzhou as vanguards and horses, and sent troops to Liaodong.

In October of the same year, Li Shimin told Chang'an to be managed by Fang Xuanling, and personally led the prince Li Zhi and the civil and military officials of the court to move into Luoyang.

Li Shimin personally fought for Goguryeo.

October 21, 18th year of Zhenguan.

Li Yuanai led Yan Liben and Jiang Zhiming back to Luoyang.

The three of them received a kind hospitality from Li Shimin and personally welcomed them to the Luoyang Palace.

Li Yuanai has worked hard for two years and has not yet sat in the hot position. Li Shimin gave him a new task without hesitation.

Receive a monk who travels west...
Chapter completed!