Although Meng Da had promised Zhuge Liang to rebel Wei and return to Shu, he would send troops to attack Chang'an directly when Zhuge Liang left Hanzhong in the north, and finally the two groups joined forces to advance eastward to Luoyang. If this strategic plan was finally successful, Cao Wei would definitely fall into unprecedented danger. Even if he could not capture Luoyang, he would at least incorporate the three places of Xincheng and the two prefectures of Yongliang into the territory of Shu Han, thus forming a strong positive pressure on Luoyang.

But Zhuge Liang always felt uneasy because he also knew that Meng Da was capricious and not a steady person. There was a possibility of changes over time. If Meng Da repents at that time, not only would the strategic plan issued by both sides be shattered, but Meng Da might even leak Zhuge Liang's plan for the Northern Expedition, and then the passive one would be Zhuge Liang himself.

At this time, Ma Su suggested to Zhuge Liang: "When I went to Xincheng to meet Meng Da, I heard that the prefect of Wei Xing, Shen Yi, had always been in a quarrel with Meng Da, and I thought that maybe I could use this person to force Meng Da to rebel quickly."

Zhuge Liang understood Ma Su's meaning, so he immediately sent his general Guo Mo to pretend to defect to Shu Kingdom, and came to Wei Xing to defect to Shen Yi, and then deliberately leaked the information that Meng Da and Zhuge Liang had conspired to launch a sudden attack on Chang'an.

After Shen Yi, who had always hated Meng Da, learned this news, he immediately sent someone to inform Sima Yi, who had just arrived in Wancheng's military commander Jing and Henan, hoping that he would send troops to quell the rebellion immediately.

At the same time, Zhuge Liang also notified Meng Da about Shen Yi's informing him, which frightened Meng Da. So he actively prepared to raise military food and grass, ready to initiate the matter in advance at any time. Zhuge Liang also mobilized troops in Hanzhong to send troops to Longyou to make final preparations, intending to send troops to support his actions immediately after Meng Da's uprising.

In December of 227 AD (the first year of Taihe of Wei), Sima Yi, who led his army to Wancheng, received a secret report from Shen Yi. At that time, Zhong Yu and Cheng Wu, who were following him, were surprised when they saw it. However, Zhong Yu also understood why Sima Yi had to go to the border of Xincheng to inspect the terrain. It can be seen that his rebellion against Meng Da was expected.

Considering that Meng Da's uprising would cause great harm, Cheng Wu and Niu Jin immediately suggested that Sima Yi should send troops immediately, but Zhong Yu did not agree with this opinion:

"Wancheng is thousands of miles away from the new city. It will be even more exciting for us to send troops rashly. By then, we have not yet reached the new city. I am afraid that Mengda will have crossed the Qingni Pass and rushed to Chang'an City. Xiahou Wei, who is guarding the city, is a pampered young man who is timid and timid, and he will definitely not be able to stick to it."

After listening to Zhong Yu's words, Niu Jin also understood the seriousness of the situation:

"If Meng Da occupied Chang'an, it would be like cutting off the connection between the capital of Wei Luoyang and Yongliang. Then Guo Huai and Zhang He would definitely be in an isolated situation, and Zhuge Liang would be able to annihilate them one by one without any worries."

Everyone was watching Sima Yi standing in front of the map and staring at the new city for a long time, and finally made a decision:

"I want to write a letter to Meng Da personally. At this time, no matter what, he cannot be allowed to raise an army."

Zhong Yu expressed doubts about the feasibility of Sima Yi's idea:

"I'm afraid that this was something Zhuge Liang deliberately missed to us. The purpose is to use you to force Meng Da to send troops in advance. Now that the truth has been revealed, Meng Da's send troops is almost unchangeable. It is very difficult to stop him. What do you want to do?"

Sima Yi turned around and asked back to Zhong Yu:

"I ask you, why did Zhuge Liang use Shen Yi to report the news?"

For some reason, after hearing Sima Yi's words, Zhong Yu suddenly burst into laughter, which made Niu Jin and Cheng Wu standing aside completely confused. After looking at each other, they all looked at Sima Yi and Zhong Yu with surprise and confusing eyes.

Cheng Wu, who had a straightforward personality, couldn't hold it anymore, so he took the lead in asking Zhong Yu:

"What's so funny?"

After wiping away the tears that oozed out of the corners of his eyes, Zhong Yu stopped smiling and explained:

"Zhuge Liang was worried that Meng Da would be capricious, so he took advantage of the disagreement between Shen Yi and Meng Da and deliberately leaked the secret to Shen Yi, with the purpose of allowing Zhong Da to force Meng Da to rebel quickly..."

At this time, Sima Yi took over his words:

"And I am going to use this to paralyze Mengda."

Soon, Sima Yi wrote a handwritten letter and sent someone to send it to Meng Da, the new city, overnight. Meng Da was originally worried because of the leak of news and was worried all day long. When he received Sima Yi's letter, his heart even raised it to his throat. However, when he opened it, he found that the content was far beyond his expectations...

In the letter, Sima Yi took the initiative to tell Shen Yi about the news, and also expressed his stance and firmly believed in Meng Da's loyalty. At the same time, he expressed doubts about Shen Yi's time when he framed Meng Da. He believed that if Zhuge Liang really joined forces with Meng Da, how could such a big thing be easily leaked? Shen Yi had a criminal record of betraying Cao Wei and surrendering to Shu Han. In addition, Shen Yi had secretly reported to the court many times to report Meng Da's various illegal actions during his tenure, which shows that he had personal grudges against Meng Da. I am afraid that his motives this time are also questionable, so Sima Yi begged Meng Da to take strict precautions and must not let Shen Yi take any actions that are unfavorable to Cao Wei.

After reading the letter, Meng Da breathed a sigh of relief, believing that Sima Yi actually regarded Shen Yi's report as a frame-up with ulterior motives, so he temporarily put it aside because he was extremely nervous and actively preparing to attack Chang'an.

Zhuge Liang, who was secretly monitoring Meng Da's actions, received information that Meng Da suddenly slowed down the pace of the army. He felt strange and anxious. So he sent several urgent letters to urge him to rise up as soon as possible, and reminded him that Sima Yi had learned about this and would definitely not sit idly by.

But Meng Da said in his reply to Zhuge Liang:

"Wancheng is more than 800 miles away from Luoyang and more than 1,000 miles away from Xincheng. As the frontier minister of Cao Wei, Sima Yi must get Cao Rui's approval if he wants to attack me. It will take at least one month just to wait until he asks Cao Rui for instructions. By then, I have already built the city. The new city, Shangyong land, has always been a place with deep and dangerous terrain. Sima Yi is a smart man and must not dare to attack in person. Even if he comes, he will just die."

Seeing that Meng Da not only did not listen to his advice, but also changed his plans and held the new city without authorization, Zhuge Liang suddenly felt that something was wrong, so he immediately said to Liao Hua: "You go to Jiangling immediately and hold my personal letter to meet Lu Xun!"

Liao Hua didn't understand why Zhuge Liang contacted Lu Xun at this time, but he still followed the order and did it.

After Liao Hua left, Sima Zhao, who was sitting cross-legged by the side, shook his body and said:

"Does the Prime Minister want to convince Lu Xun to send troops to the new city?"

As he said that, Sima Zhao pinched the pen on the pen holder and drew a big fork where the new city was written on the map:

"I'm afraid it's too late..."

There is only one reason why Zhuge Liang did this and Sima Zhao said this:

Because they all know that Sima Yi is a character who doesn't play according to common sense...

After receiving Zhuge Liang's handwritten letter from Liao Hua, Lu Xun also realized that if Meng Da existed, it would not only be beneficial to Shu Han, but also an effective force for the Eastern Wu to restrain Cao Wei in the northern part of Jingzhou. So he agreed to Zhuge Liang's request and sent Ding Feng to lead 10,000 troops from Dangyang to advance north, and Zhuge Liang also sent Ma Dai to lead 20,000 troops from Badong to Shangyong's hinterland.

Although Zhuge Liang and Lu Xun made correct judgments and actions in time, they were still one step later than Sima Yi...

As early as when sending messengers to send the letters to Xincheng, Sima Yi had already led his army to set out without asking the Luoyang court for instructions, passing through Nieyang, Rang County and heading straight to Nanxiang, and heading towards Xincheng at night.

As a result, in less than eight days, Sima Yi led an army of 50,000 to the city of Shangyong, completing a major military miracle.

At this time, Meng Da saw Sima Yi's flag floating under Shangyong City very conspicuously. He was completely stunned and couldn't help but exclaim:

"It took me eight days to get up, and Sima Yi killed the city from thousands of miles away. How quickly..."

Although Meng Da wanted to resist stubbornly, the morale of the entire Shangyong City had been completely disintegrated due to the sudden outbreak of Sima Yi's army. Meng Da took advantage of the geographical advantage of surrounding water on three sides of Shangyong City, which was erecting fences outside the city to block Sima Yi. However, Sima Yi took advantage of the time when the defenders arranged the wooden fences, and suddenly ordered the troops to cross the blockade, repelled the defenders and destroyed all the wooden fences.

At this point, Shangyong City has been surrounded by Sima Yi, and Meng Da has no chance to break through.

As Sima Yi expected, Ma Dai and Ding Feng's reinforcements were also expected. While advancing from Wancheng, he ordered the prefect of Weixing Shen Yi and the prefect of Xiangyang Sun Li to set up ambush 500 miles southeast of Jiexian and Shangyong, causing reinforcements to be blocked and unable to advance.

In the first month of 228 AD (the second year of Taihe of Wei), Sima Yi determined that the food and grass in Shangyong City had been cut off, so he began to launch a continuous harassment and attack Shangyong City in eight directions. At the same time, in order to quickly fight, he adopted Zhong Yu's strategy and persuaded the city's defenders Deng Xian and Li Fu to surrender. As a result, after the 16th day of the official attack, Meng Da's nephew Deng Xian and deputy general Li Fu opened the city to surrender.

Soon, the reinforcements from Wu and Shu saw that Shangyong City was destroyed, and they also withdrew their troops one after another.

Sima Yi led his army into Shangyong City. Looking at Meng Da, who had been tied up, he looked at himself with a sad look. He walked in front of Meng Da and squatted down, put his face close to Meng Da's ear and whispered:

"When the late emperor handed over Shangyong to you, he once said to you: Don't let the surprise attack Shangyong repeat it on you. I didn't expect it to be a prophecy..."

Seeing Meng Da lowering his head with a look of ashamed look on his face, Sima Yi stood up and said lightly:

"Behead Meng Da and spread it to the capital together with my apology documents!"
Chapter completed!