Liu Bei set up a banquet for Guan Yu, Zhuge Liang, and Lu Su to catch the wind, and returned happily that night, not to mention the details.

In the next two days, after briefly catching up with his eldest brother, Guan Yu will be sent to Huaiyin in the north to preside over the work of harassing the grain line of Yuan's army on the Huai River with a naval army.

Ji Lingbu, who had already hit his head and bled under Xuyi City, would undoubtedly be made even more miserable by Liu Bei's participation in the war. Not only will the city not be able to be captured, but even the food may gradually become unsustainable.

The strength of Ji Ling's side was actually strengthened twice in mid-June, but it was useless. With Zhao Yun and Zhang Fei there, the strong attack cannot be attacked no matter what, it can only be besieged.

Guan Yu himself didn't need to go to the front line at all, anyway, the Yuan army didn't have any decent sailors on the Huai River, except for the grain ship. He only needs to be in charge of Huaiyin County, which sits in the rear, to organize and expand the naval army as soon as possible, and the specific task of patrolling and cutting off food is enough to be carried out by the officers below.

Because Lu Su has also been eating, drinking, and chatting with Guan Yu these days, he is quite familiar with Guan Yu, and he pities each other, of course he will go to the dock on the day of farewell.

On the afternoon of July 12, Liu Bei, Zhuge Liang, and Lu Su all came to the wharf by the river, and the rest of Mi Zhu and others also came.

Others are not surprised by the time and place of the send-off, obviously the old Guangling, only the new Lu Su is still quite curious: why did you choose to leave in the afternoon?

He originally thought that this was just for the luncheon to set up wine, but after some staggering, as Liu Bei personally sent it to the Shuizhai Wharf by the Yangtze River to send Guan Yu to the ship again, Lu Su, who was familiar with geography, finally saw that something was wrong.

He couldn't help but ask Zhuge Liang: "Why did General Guan go north directly on the shipper?" Does he have to sail from Hailing County to the East China Sea first, and then go north to Haixi County and back to the Huai River? These ships are all lanky clippers, how can they withstand the bumps of the waves? ”

From these two things, it can be seen that Cao Cao's worship of the Son of Heaven is false, and it is true that he coerced the Son of Heaven to punish dissidents. If he can use this to kill Yang Biao today, and after cleaning up Yang Biao and Yuan Shu tomorrow, won't he want to implicate Yuan Shao again? Otherwise, how can there be a reason that in-laws must be connected, and brothers do not have to be connected? Isn't that a matter of reluctance?

For the northern princes with a strong army and a weak army, this means that the strength of the Huaihe defense line must be strengthened, and it is necessary to guard both Hefei and Huaiyin with heavy troops, which occupies a lot of troops of the northern land princes in vain.

"Brother Zijing is worthy of being a well-educated person who is well versed in geography, and he will definitely have the potential to be a famous general in the future, but he must always review the past and learn the new.

A few months ago, Zhuge Liang repaired the sluice gate of the Hangou Canal for Liu Bei, as well as the two-way bifurcation of the estuary channel connecting the Yangtze River with the Hangou River. The average water level of the entire channel of the ditch has been raised, especially the opening connecting the Yangtze River in the southern section of the channel, and the draft is at least six or seven feet deeper than before, and it is possible to pass through larger boats.

Taiwei Yang Biao, the second division of the calendar, enjoys the extreme position of the country, and now Yuan Shu is called the emperor, Cao Cao only thought that Yang Biao and the Yuan family had in-laws and went to prison to torture and torture, and the cruelty was prepared. I heard that Shaofu Kong Rong ran up and down for it, and Yan Zhouli's father and son were not implicated, how could they kill Yang Biao because of their in-laws? said that if Cao Cao killed Yang Taiwei, then those who watched and listened at home would no longer believe Cao Cao. Although he Kong Rong is a man in Lu Country, he should also brush his sleeves and leave tomorrow and no longer come to the court - this is the second.

After Liu Bei heard about this strategy, he had one more layer of moral concerns than when the Zhuge brothers discussed it internally, so he couldn't help but ask more: "But the imperial court will let me attack Yuan Shu, not to mention that Yuan Shu is a thief, and I actually make peace with him, is it unrighteous?" ”

At this moment, facing Lu Su's question, Zhuge Liang can also show him very proudly:

……

After the group said goodbye to Guan Yu, Liu Bei finally had time to talk to Zhuge Liang and Lu Su more, and calm down to talk about the relatively pragmatic grand strategy and the general righteousness of the world.

Because having one more node like this is absolutely good for the side where the navy is strong and the army is weak. This means that the strong side of the navy does not have to stare at Hefei for a point in the future, and Hefei can also change Huaiyin if it does not move.

Since June, our army has annihilated 20,000 Yuan troops, while the total strength of our army Guangling and Yuzhang combined is only 40,000. This has annihilated an enemy equivalent to half of our own troops, and what other princes in the world have worked so hard to forget themselves and destroy their families to relieve their difficulties?

In history, Soochow had the advantage of a large ship and a naval army, how could Sun Quan give up this interest and only use a small boat to fight the northerners? Cao Cao also calculated this precisely because he let Zhang Liao and others focus on defending Hefei, but they were not too worried about Huaiyin.

So he could only ride a horse to follow Zhuge Liang, and the group finally rode to the mouth of the canal, watching Guan Yu's team first line up in the mooring river to be north, and waited for a while, and when the time was halfway through, the river had reached the top of the tide, and then began to recede.

Lu Su was originally just selling his own opinions, and he had talked to Zhuge Jin before. This time, Liu Bei came here, and after optimizing the integration and reorganizing, he peddled it again.

"One more point, please be aware of it. Su thought that the general had treated Cao Cao with the heart of a gentleman and the belly of a villain. Perhaps when Cao Cao first welcomed the Son of Heaven last year, his performance was quite deferential, and people all over the world felt that he had reformed and was willing to be a loyal and righteous Hanchen from now on, which was understandable.

For example, at the end of the Ming Dynasty, the Qing army Duoduo went south, that is, the big ship carried the Hongyi cannon, took the canal from Huaiyin to Yangzhou, Shi Kefa was martyred, and Yangzhou was ten days. An important premise for Duoduo to be able to fight like this is that the navigability of the canal has been greatly improved, otherwise Duoduo would have to learn from Sun Quan or Jin Wushu to gnaw Hefei obediently.

As soon as Lu Su came, the local officials in Guangling County were full, and Liu Bei temporarily used the general's mansion to conquer it. For example, Cao Cao's side, Cao Cao's current things and Cao Peng are Sima Lang and Mao Jue respectively, this position is not high, but he will see the big leader every day and report to work.

Liu Bei thought about it again and again, and couldn't help but praise: "Zi Jing saw the slight knowledge, just from one or two cases, it was like a bad idea that Cao Cao might hide, which made me feel refreshed."

This Hangou Canal, since April, is no longer what it was back then. In March, when the geography is re-examined, why is it too late for my brother to see things? ”

And two and a half years is enough time for a lot of changes in the external environment. Cao Cao in July of the second year of Jian'an, the crime of being unsubdued was much less than that at the beginning of the fifth year of Jian'an. This also forced Lu Su's observation to be more careful, analyze and peel off the cocoon, proving that "Cao Cao is a bully to the monarch rather than a king", helping Liu Bei to make this psychological construction switch faster and better.

And the biggest trend in the world at the moment is nothing more than how to adjust the strategy of Yuan Shu in the next step. Zhuge Liang didn't hide it, as soon as Liu Bei opened his mouth, he told him the plan he had discussed with his eldest brother:

Liu Bei is still very good at time management, although he knows that it is more important to attract newcomers, but he also knows that it is very hard for Guan Yu to be alone during this time, so Guan Yu's days are mainly to appease Guan Yu, and ask others after saying goodbye.

Lu Su was stunned, still puzzled for a while. Just because they got off the boat that day, they disembarked directly at the wharf by the Yangtze River, not in the canal, and he went directly into the city after getting off the boat, and he had not seen the new river channel and sluice gate of Hangou with his own eyes.

"How is that possible? Since Wu Wangfu sent to repair the ditch, six hundred years, I have never heard of the ditch can pass the big ship, at most it is just a sail. Kong Ming didn't deceive me into not knowing the geography? ”

This is not just a matter of saving people's power and governing Guangling. Zhuge Liang actually changed the strategic geography between the Jianghuai and Huai River by himself!

Zhuge Liang's words were hearty and clear, and Liu Bei's moral concerns were finally resolved.

As mentioned earlier, between the Jianghuai River, there are obviously two waterways that can be communicated, east and west.

Liu Bei said again: "Could it be that he dislikes the official? That monster has a low status, only one county, and can't give more real positions, so he can only use the general's mansion to allow people.

A lot of old geographical knowledge of grain transportation by the troops, just because Zhuge Liang opened the map editor, they all have to be re-learned!

And today's occasion is more than Zhuge Jin originally expected, and there is an unexpected more Lu Su. Lu Su naturally wanted to show himself, so he hurriedly threw out some supplementary opinions:

When Lu Su made up for all this, Zhuge Liang told him lightly:

Before Zhuge Liang came, he obviously expected Liu Bei to ask this question, and couldn't help but persuade with a wry smile: "Our army did not make peace with Yuan Shu clearly, but there were times when the army was tired and needed to rest and recuperate.

Unexpectedly, he went around with bragging and blowing, Liu Bei suddenly asked him to be an official, and the atmosphere was set to this point, and he couldn't think of a word to refuse.

"General, for today's plan, our army has forced Yuan Shu to retreat in several ways, and as long as the land does not attack again, the water army will be cut off from food, implying that Yuan Shu's army has no intention of immediately retaking its counties, and only seeks self-protection for the time being. In this way, this battle can be slightly resolved, and induce Yuan Shu to finally abandon our army and attack Cao Cao. ”

Lu Su originally wanted to consider it, but Liu Bei said that he was too small an official, and he had no choice but to accept it, so as not to leave the notoriety of "greedy for wealth and wealth, and not sharing hardships".

"In that case, the matter is settled." Liu Bei clapped his palm, and then turned to Zhuge Liang,

Until the Tang and Song dynasties, because the ditch was repaired with a sluice gate, the water level was raised, and the navigation capacity was greatly strengthened (also because the specifications of the ditch rebuilt by Emperor Yang of the Sui Dynasty were higher than that of the husband), and then the Huai River attack may not have to go to Hefei again-

But now that he is about to celebrate his anniversary, his foundation is gradually solid, and a lot of transgressions have been revealed. When he first arrived in Luoyang last year, he expelled Yang Feng and Han Xian, who had made meritorious contributions when he returned to the east.

However, at the end of the Han Dynasty in this time and space, the Jianghuai strategic pattern between the north and the south has obviously been changed by Zhuge Liang.

"How dare you think that the official position is low...... Although it is Cao Peng of the General's Mansion, I am afraid that he will not be competent. ”

Indeed, in the future, we must distinguish more about the orders of the imperial court, whether it is the true intention of His Majesty or the chaotic fate misinterpreted by Cao Cao, and we must no longer blindly obey it blindly - it is better to ask Zijing to deign to temporarily serve as the West Cao Peng of the General Mansion of Zhengnan, and I will listen to the teachings in the morning. ”

It wasn't until Lu Su finished reading the whole process that he intuitively understood the subtle principle, and when he looked at Zhuge Liang again, his expression became more and more awe-inspiring.

He is only in the field he is best at, and he barely has the strength of the Zhuge brothers by seven or eight points, but he is all-round! (except for force value)

When I started this small project, at the beginning, I just wanted to save the people's labor of the slender men and stevedores, and by the way, I wanted to control the saline-alkali land around Sheyangze, so that Guangling County could have millions of acres of fertile land......

After hearing all this, Lu Su couldn't help but feel inferior, it seemed that he still didn't fully realize the gap with the Zhuge brothers before.

You must seize the opportunity to get along with Zhuge Liang, enlighten and broaden your horizons, and then go back and work hard to make up for it, so as to have the opportunity to impress people in the future.

"Sir, I have strengthened my determination to lure Yuan Cao into battle. However, how to do it, how to ensure that Yuan Shu can be mobilized by us, and how to ensure that Cao Cao also has to fight, I have to ask Mr. to teach me carefully. ”

Lu Su's geographical cognition is really correct under normal circumstances - this is why in history, Sun Ce only attacked Hefei and not Huaiyin when he went north.

Liu Bei has the name of the general of the four expeditions, and he can open a full set of shogunates, but his talents are withering, so he does not set up the long history and Sima of the general's mansion. Most of the talents were placed in the positions of magistrates in Guangling and Donghai, and the team of the general's palace was not complete.

Moreover, even during the period of recuperation, our army is not completely without fighting, and there will still be water battles without fighting on land in the future, which is also a lack of strength, only the naval army can handle it, and it cannot hit a stone with an egg. As long as our navy does not stop threatening the Yuan Shu Channel, it will already be a model in the world. ”

Lu Su's words were obviously more intense than his analysis when he voted for Sun Quan in history. But there is no way to do it, because he came to see Liu Bei this time, two and a half years earlier than he met Sun Quan in history.

Later, Yang Feng and Han Xian were forced to defect to Yuan Shu, and now Yuan Shu is called the emperor, and the two have no choice but to fall into the hands of thieves. This is one of them.

Zhuge Liang smiled indifferently: "Why do you want to go to sea at sea?" The Hangou Canal is at present, isn't it okay to go to the Hangou canal? ”

This project was originally hoped to be carried out by his eldest brother, so that the family of Liu Bei, who fled south after the defeat last year, would not have nothing to do in the winter, and would work for relief. I am just the specific design and construction, and the strategic planning is still the credit of the big brother.

Only then did Lu Su see that the huge gate of the northward branch of the ditch had been opened, and the fresh water of the Yangtze River poured into the ditch along the slight water level difference, and the fifty warships with Guan Yu could flow north on their own without paddling or pulling fibers.

In such a clever name, I am afraid that it will never be extinguished. Once Cao Cao tasted the sweetness, he would not stop again, and in the end, he would be rewarded and punished by the heart, and tortured in the mouth, allowing him to act recklessly! The general's loyalty and righteousness are well known, but he must not be too stupid and loyal, so that he is used by Cao thieves and regrets that his relatives and enemies are happy! ”

On the way back from Zhulian to the east, the old minister who had a good relationship with Yang Fenghan Xian, Zhulian Yang Biao, these two cases were originally not big, but after Lu Su deduced them by analogy, they looked a lot more serious.

Zijing Ruoken served as West Cao Peng, although he was temporarily listed with the main bookkeeper Sun Gongyou and East Cao Peng Bu Zishan, but as long as there was a chance to make meritorious contributions, Sima and Changshi were just around the corner. ”

Cao Cao coerced the Son of Heaven in his hands, as well as Qingzhou soldiers, and Yuan Shu became emperor for a month and a half, but he was always accumulating strength, watching success or failure, and preparing for the autumn harvest in Tuntian. Is there a face that asks us to do more?

"Will this change be detrimental to Xuande Gong?" This question immediately popped up in Lu Su's mind, but he soon realized keenly that there was a high probability that it would not.

If a soldier hears this, he may not think about it. But Lu Su is well versed in military geography, and he couldn't help but be surprised when he heard this:

However, the western side of the river is a natural river, much wider, and even a boat can drive it. And the ditch was too shallow in the Han Dynasty, and the ships and fighting ships would run aground directly if they were forced to drive over, not to mention the building ships.