"Deju, what's going on in Luling City?" On the second day, Cao Cao summoned Wenwu to discuss the military situation in Cao Junshuizhai, which was more than 100 miles away from Anxian County.

"Returning to the Prime Minister, before we arrived here, Sun Quan had already strengthened the defense of Luling, and Sun Quan seemed to have intentionally dug up all the waterways near Luling, and now the water level near Luling is about ten meters deeper than usual." Cai Mao arched his hand and returned to Cao Cao, looking very respectful.

"Dejun, does the rise in the water level have any impact on our army?" Cao Cao fought in the north for a long time, and he didn't know the details of the southern naval army's operations, so he had to rely on Cai Mao, the governor.

"Prime Minister, the rise in the water level has no impact on our army's navy, there are large building ships, medium-sized warships, and small ships in our army's water, and how much the water level rises does not affect the combat strength of our army."

"Does it affect the combat effectiveness of our army? So why did Sun Quan raise the water level? Cao Cao listened to Cai Mao's words, not very satisfied, Sun Quan has been operating in the Chaisang area for more than ten years, Zhou Yu has trained a quite powerful naval army in Poyang Lake, the water level must have been planned, but Cai Mao said that there is no problem, which makes Cao Cao very confused.

"Prime Minister, Sun Quan's intentions are still not understood, but now it is certain that if our army wants to attack Luling, it will not be able to use infantry soldiers. It can only be used by the water army, because Luling has been flooded. Cai Mao arched his hand and replied to Cao Cao. Sun Quan's approach is also incredible. If Sun Quan wants to flee west, he will definitely strengthen the defense line of Luling and send an army to defend Luling to buy time for his westward escape, but flooding Luling City does not seem to have anything to do with strengthening the defense line. Did Sun Quan think that there were no infantry? He and Lu Dai's sailors are vegetarians?

"Dinggong. What do you think? Cao Cao saw that Cai Mao couldn't see through Zhou Yu's plan, so he could only turn to ask Lu Dai.

"Back to the prime minister, I thought that the only purpose of Sun Quan's flooding of Luling was to make our infantry lose their combat effectiveness, but in this way, the supply in Luling City would definitely be affected, Sun Quanjun's move was really weird, maybe we could only break through Luling. in order to know Sun Quan's arrangement. Lu Dai and Cai Mao agreed that the result of flooding Luling was to make Cao Cao's infantry lose their fighting power, but this approach was difficult to be effective in front of Cao's army with powerful ships, and it would weaken Luling's defenses.

"Guys, what else do you think?" Cao Cao's subordinates are basically northern generals, and they really have no experience in water stations, and those who can speak are only Lu Dai and Cai Mao who have experience in water combat. After the two of them finished speaking, the others basically had nothing new.

"Extraordinary. You have fought against the Sun army here, what do you think? Cao Cao saw that the atmosphere was a little embarrassing, so he pulled Lu Rui out.

After Lu Rui received the information that Sun Quan flooded the Luling Tomb, he had been thinking about Sun Quan's purpose in his heart. When Zhou Yu's army arrived in Luling, he did not carry out any attack on himself for half a month, which made Lu Rui very strange. If Zhou Yu wanted to stop Lu Rui in Luling, the best opportunity was to take advantage of the fact that Lu Rui and Cao Cao had not yet joined forces to attack Lu Rui, but Zhou Yu did nothing, which made Lu Rui feel quite uneasy, and it was not a good sign that Mei Zhoulang would not do anything.

After listening to Cai Mao and Lu Dai's analysis, Lu Rui was even more sure of his thoughts, Luling must not be flooded to stop Cao Jun, but had another ulterior purpose. It's a pity that the spies can't get past Sun Jun's patrol, otherwise they would have known the situation in Luling City.

Don't know the situation in Luling City? Lu Rui suddenly had an idea, and thought of a bold assumption, now Cao Jun's spies can't come back, and the news of Luling has been cut off for more than half a month, if there is no Sun Quan's army in the city, Cao Cao will not be able to receive any information. Could it be that Sun Quan's main force is no longer in Luling?

"Back to the Prime Minister, our army has not had any new information about Luling for more than half a month. Now we don't know whether Sun Quan is in the city or not, Rui suspects that this is a suspicious plan. Lu Rui arched his hand and replied to Cao Cao.

"Master Hou, Mao also thinks that Sun Quan should have left Luling and set up a naval defense in Luling to block the pursuit of our army."

"No, General Cai, you misunderstood what I meant, I mean that Sun Quan's main force may not be in Luling City, and Luling City may just be an empty city!" Empty city plan, Zhou Yu can put up an empty city plan to confuse Cao Cao, and there may only be a small number of troops in Luling City.

"Hou Ye's guess?" Cai Mao touched his chin, and recalled the situation of expelling Sun Quan's army near the crocodile mouth at that time, those water armies were Zhou Yu's water army, Poyang Lake water army, he would not be mistaken, but of course Zhou Yu's water army just came into contact with Cai Mao's water army, and then retreated to Luling, originally Cai Mao did not have any suspicions, because the reinforcements arrived, and it was very reasonable for Zhou Yu to retreat, but now in retrospect, this soldier retreated a little quickly.

"Oh no, I'm afraid I've fallen for Zhou Yu's trick again!" Cai Mao remembered that Lu Xun only brought 3,000 military horses to stop Lu Dai in Poyang Lake, and it seemed that Zhou Yu might have repeated his old tricks.

"What do you mean, Deju?" Cao Cao saw the change in Cai Mao's expression and hurriedly asked Cai Mao.

"Returning to the Prime Minister, I am cautious with the Dinggong soldiers, especially the naval soldiers, the water is not as good as the land, the wind and waves do not know when they will attack the fleet, so when the navy marches, it must be equipped with grain and grass supplies with the ship, because the grain and grass supply with the ship, so the time for the preparation of the navy is often quite time-consuming. I'm afraid that Zhou Yu took advantage of this and set up an empty city plan! "Zhou Yu has been fighting Cai Mao for many years, of course Zhou Yu knows Cai Mao very well, and Cai Mao did not give Zhou Yu a loophole because of her cautious nature. This caution can also be exploited by Zhou Yu.

Cao Cao listened to Cai Mao's words and immediately understood that the preparation time of the naval army was often more than that of the infantry army, and Zhou Yu may have taken advantage of this and set up a delaying plan.

"Quickly pass the military order, eat at noon, after noon, the army will attack Luling, and I want to see if Luling is an empty city!" After Cao Cao listened to Cai Mao's words, he immediately made a decision, he didn't expect Zhou Yu to be so bold. I want to use the empty city plan to put Cao Cao together!

"No!"

"General. Cao's army seems to have attacked in an all-out way. "On the top of the Luling City Tower. One of Lu Xun's personal soldiers pointed into the distance, only to see Cao Cao's more than 20 ships heading towards Luling City.

"Sending troops so soon?" Lu Xun was stunned for a moment, originally thinking that Cai Mao's army had just arrived near Luling and would have to cultivate for a period of time before attacking Luling City, but he didn't expect to dispatch the army so soon.

"General, have we been recognized? Cao Jun knew that there were only a small number of troops in Luling City? ”

"It seems that there are still masters in Cao's army, and the plan of the Metropolitan Governor has been broken, and there is no point in us staying here. Ordered the sergeant to burn the city of Luling. Then we rode on a ship and headed west, and according to the water situation, the Governor's plan to build a river had been successful. Lu Xun smiled slightly, Cao Cao, you are a step late.

"No!" The soldiers took the order and left, and soon set fire to all parts of Luling City.

"Governor, look, Luling City is on fire!" Before Cai Mao's army came into contact with Sun Quanjun's ship, Luling City was on fire. Looking at the raging fire, Cai Mao knew. I really fell into the scheme, Luling City is really an empty city.

"The herald ordered the whole army to advance at full speed. Ordered to inform the Prime Minister. Luling City is already an empty city, please make a decision as soon as possible. Cai Mao slapped the bow of the boat hard and let Zhou Yu run away again.

The next day, in Luling City, Cao Cao sat on a five-story ship, anxious to discuss political affairs. Sun Quan's flooding of Luling City was far beyond Cao Jun's imagination, and the average depth of water in the city reached five meters, and the deepest place was ten meters, which caught Cao Jun off guard. Taishoufu definitely can't live, so he can only spend the night on the building boat.

"Dejue, what the hell is going on? What is Zhou Yu's plan? "Cao Cao entered a water city for the first time, a water city that didn't even have a clean foothold, and he had to spend the night on a boat.

"Prime Minister, I guess that Zhou Yu probably used a plan to build a river, this plan came from Zhao Tuo, but it was recorded in sporadic ancient books, but I didn't expect that Zhou Yu actually turned it into reality."

"A plan to build a river?" Everyone was stunned when they heard Cai Mao's new words, what kind of strategy is this, is it to create a river alive? Even a person like Lu Rui who crossed had never heard of a river-building plan.

"Prime Minister, this is a legend that Mao heard when she was a child and traveled to study."

It turned out that the Lingnan area was flooded with heavy rains in spring and summer, and after the river flooded, it became a flood. When Qin Shi Huang went south, in order to transport soldiers and horses, he built a Ling Canal in Guilin County and transported soldiers and horses into Jiaozhou, which is a thing that everyone in the world knows.

Later, the Qin Dynasty rioted, and Zhao Tuo established himself as king in Lingnan, but of course the Qin Dynasty was not satisfied and sent a large army south to crusade. Zhao Tuo held on to Guilin County and blocked the army of the Qin Dynasty. However, the army of the Qin Dynasty was hundreds of thousands, and there were clever generals who came up with a way, which was to start from Luling, bypass the mountains of Lingnan, and raid the rear of Jiaozhou, which is now Cangwu.

The mountains of Lingnan are the northern barrier of Jiaozhou, and the only exit is Guilin County. The generals of the Qin Dynasty came up with this method and tried to send an army of 10,000, and in the end, more than 1,000 people rushed out of the Lingnan mountains and attacked Cangwu, but more than 1,000 people were quickly defeated by Zhao Tuo.

After Zhao Tuo discovered this loophole, he came up with a plan to build a river to block the northern army.

From Luling to Wumanxi is the Jingzhou mountains, which correspond to the Lingnan mountains, and in the middle of the two huge mountain ranges is a canyon plain hundreds of miles long. Zhao Tuo chiseled all the rivers in the mountains of Lingnan, let the flood flood canyon plain, and the heavy rain season in the south formed a river channel, which is the plan to build a river.

From spring to autumn, the artificial river will subside due to the lack of rain, but as long as the winter is over, Zhao Tuo can use the river construction method again. Since only one quarter was the dry season, it was no longer possible for the northern army to enter the Lingnan mountains through Luling and attack Jiaozhou. Because of this, at the end of the river-building plan, Guilin County naturally became the only channel into Jiaozhou.

"Zhao Tuo is really powerful, he actually knows how to use the right time and place to stop the northern army!" Lu Rui couldn't help but admire Zhao Tuolai, history only recorded Zhao Tuo's road to the north, and he was the leader of Jiaozhou for several generations, but he didn't accurately explain how to cut off the road to the north, it seems that this plan to build a river is really powerful.

"What does General Cai Mao mean is that Zhao Tuo used the terrain to form the prototype of a river channel, and then successfully created a river by irrigating water?" After listening to Cai Mao's words, most of the people were still in the clouds, and Cao Chong made a metaphor to explain to everyone.

"Well, Zhao Tuo really deserves to be the king of Lingnan, and he actually came up with such a plan to stop the northern army. General Cai, since Zhou Yu has successfully built a river, are there any other mysteries in this river? As soon as Cao Chong explained, Cao Cao understood, but Cao Cao didn't know what the mystery of this river-making plan was.

"Your Excellency, the great river created by the plan to build the river will change differently depending on the season. For example, in the early spring, there is less rain, and the depth of the river is inevitably insufficient to allow small ships to pass through the river, but in the summer, the river rises sharply, coupled with the attack of heavy rain, which is enough for large boats to pass. In autumn, when the river is calm, the river will gradually recede, and in winter, there will be no such thing as a big river. ”

"It's just that walking on the river, from time to time you will encounter strange winds and raids, the last general has only heard of this plan, but has never seen it, please think twice." Cai Mao saw Cao Cao asking herself, knowing that she was going to make a decision to pursue, but she hadn't really tried the power of building a river, and she didn't know what the mystery of this artificial river would be.

"General Cai, I only want to ask you, if you pursue Sun Quan now, can our army still pursue Sun Quan?" Cao Cao glanced at Cai Mao, didn't talk nonsense, just asked if he could pursue Sun Quan.

"Prime Minister rest assured, it's only early spring, although our infantry can't wade through the water, but the river has not yet really traveled, our army can send a ship to pursue first, and the building boat will be behind, and Sun Quan will definitely be able to pursue in the summer." Cai Mao arched his hand and returned to Cao Cao.

Advantages are relative, and disadvantages come with them. The current river is not wide, can not be a large number of boats, Zhou Yu and their troops must be at most fifty miles away from Luling, this gap, Cai Mao has the confidence to chase Zhou Yu, as long as the water rises, the real river building is successful, Cai Mao's army will definitely be able to pursue Zhou Zhou Yu and Sun Quan.

"Okay, all the civil and military officers obeyed the order, took a short rest in Luling, ordered Gongda to prepare supplies and baggage in Chaisang, and arrived in Luling as soon as possible, as soon as the supplies of our army arrived, they would attack and pursue Sun Quan, and this time Sun Quan would be wiped out in Jiaozhou!" Cao Cao drew his sword and made the decision to pursue Sun Quan. (To be continued......)

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