When Tian Feng was escorted out of the Yuan camp in a shackle, Cao Ying on the opposite side ushered in a mysterious visitor. The night before yesterday, a double carriage galloped in front of Cao Ying's gate by moonlight. At that time, Cao Cao was sitting alone in his tent and thinking hard about what to do with the enemy. However, when he saw the prayer note from the visitor, he couldn't wait to put on his shoes and went out of the tent to greet him barefoot. No one knew that Cao Cao had a separate conversation with the visitor that night. But early the next morning, Cao Cao suddenly ordered Xiahoudun to take a battalion of men and horses to dig a trench about one and five feet wide and about one zhang and two feet deep around the Guandu camp.

"Ziyuan, can you really resist the 'Heaven Falling Apart' technique?" Cao Cao stood on top of the high post, looked at the soldiers who were busy digging a ditch below, and asked the man next to him in a hesitant tone.

The man who was questioned turned his head when he heard this, and said confidently to Cao Cao, "Meng De rest assured. You had already found out in Yuan Ying that the demon Dao Yu Ji was able to carry out the so-called 'Heaven Collapse and Earth Cracking' technique by digging a tunnel through guò to bury some kind of mechanism under the city. The soil around Guandu is soft and sandy, so just dig a trench around the camp to prevent Yu Ji from digging a tunnel to bury the mechanism. If Meng De was afraid that this move would be difficult to convince the public, he could send someone to pour pig, dog blood and all kinds of filth into the ditch, and say that it would be used to break the law. ”

No, the man standing side by side with Cao Cao in front of him was Xu Yu who had escaped from Yuan's camp earlier. It is said that Yu Ji used Duan Emei and others to forge the documents of Xu You and Tian Feng secretly communicating with Cao Cao, although he did a careful job, Xu You was not a fuel-efficient lamp. After learning that Yu Ji intended to frame him, Xu Yu escaped from Yuan's camp overnight with his cronies without saying a word, and did not even leave any reminder to Tian Feng before leaving.

Regarding the act of abandoning his allies, Xu Yu did not feel any discomfort in his own feelings. As Fu Zhu commented on him, "greedy and curable". It is undeniable that Xu You is a person with great ideas and desires, which can be summed up in a simple word, that is, "greed". And in order to realize the desire, Xu Yu will not mind the means taken. Therefore, this time he abandoned Tian Feng almost without thinking. Because Xu You knew very well that in the Yuan camp full of Ji's eyeliner, if he sent someone to report to Tian Feng, he would inevitably startle the snake. Instead of being detained in Yuan Ying with Tian Feng, it is better to escape alone, at least bring out Jiji's secrets and contribute to the rescue of the Han. Of course, he can also find a place in the Han Court as a hero who saves the driver.

With this idea, Xu Yu defected to his former friend Cao Cao overnight. Cao Cao, who was worried about the battle of Guandu, heard that Xu Yu was coming to vote, so he was naturally so happy that he went out of the tent to greet him barefoot. And the facts have also proved that Xu You's investment this time did bring a lot of dry goods. The secret of the "Heaven Falling Apart" technique alone was enough for Cao Cao to treat him as a guest.

After listening to Xu Yu's explanation at this time, Cao Cao also felt that to deal with gods like Yu Ji, he had to treat others in his own way, so as to relieve the fear of the soldiers in the army about the art of heaven and earth cracking. So Cao Cao immediately sent someone to find Xiahoudun and ordered him, "Yuan Rang, you go to find a few warlocks to drive away ghosts along the ditch, and pour pig and dog blood and other filth into the ditch." When the soldiers asked the reason, you said that it was to crack the enemy's 'Heaven and Earth' technique. ”

Xiahoudun originally only thought that Cao Cao ordered them to dig trenches in order to build fortifications. Hearing Cao Cao's order at this moment, Xiahou couldn't help but open his mouth in astonishment and said, "Lord, can this be taken seriously?" Is there really a way to crack this 'heaven and earth cracking' technique? ”

Seeing Xiahou Xuan's shocked expression, Xu Yu on the side couldn't help but touch the goat's whiskers on his chin, and proudly stepped forward to reply for Cao Cao, "General Xiahou just let it go." Mountain people have their own magic methods. ”

Although Xiahoudun knew that Xu Yu was Cao Cao's friend when he was in Luoyang. But he still has some distrust of this man who has only appeared for less than a day. Besides, the other party was once a strategist under Yuan Shao's account, in case he was secretly doing something for Yuan Shao. So Xiahoudun turned his attention to Cao Cao again, hoping that the latter could give a clear answer.

In fact, Cao Cao, who is suspicious by nature, has no idea whether Xu Youzi's method is effective. But at present, Cao Jun, including those ministers and ministers in Xu Du, are afraid of Yuan Shao's "heaven and earth cracking" technique. If you don't think of a way to suppress Yuan Shao's arrogance, then this battle will not be able to be fought in the future. Therefore, even if he had doubts, Cao Cao had to believe Xu Yu once, so as to give it a go. But seeing that at this time, he nodded calmly to Xiahoudun and said, "Yuan Rang, act according to the plan." ”

After Xiahou received Cao Cao's reply, the doubts that were entrenched in his heart were suddenly swept away. Especially thinking that his lord finally had a way to restrain the witchcraft, Xiahoudun clenched his fists excitedly and said, "I'll do it."

After watching Xiahoudun walk down the mountain quickly with a happy mood, Cao Cao turned his gaze to Xu Youtan beside him and asked, "Ziyuan said earlier that Yu Jina Demon Dao buried some kind of mechanism under the city and used it to perform the 'Heaven Collapse and Earth Cracking' technique. Ziyuan can know what kind of organ it is? ”

"It's not clear. I only knew that it seemed to be some kind of alchemy elixir. Xu Yu hesitated and replied. Xu You's words are not selling. In fact, there were too few samples collected from Liyang that day, and they were the residue of burned gunpowder, so Xu You has not been able to decipher the composition of gunpowder to this day.

"Pills?" Cao Cao bowed his head thoughtfully and thought for a moment, then decisively raised his head and assured Xu You, "It's okay. There are many people who are good at alchemy, and Lone can send them to help Ziyuan crack this elixir. In addition, Liu Ziyang in the solitary camp is also good at making mechanisms, and maybe he will also have the skill to crack it. ”

Seeing that Cao Cao was so keen to investigate Yu Ji's spells, Xu You couldn't help but laugh dumbly, "? Meng De also wants to be able to perform the technique of 'Heaven Falling and Earth Splitting' one day? ”

Cao Cao replied confidently, "Such a siege weapon, if you don't look red, isn't it a fool." ”

No matter how Cao Cao arranged for manpower to cooperate with Xu You to solve the mystery of the composition of gunpowder. At least for the time being, Cao's army's large-scale efforts to dig trenches around the camp quickly attracted the attention of Yuan Shaobu. However, most people do not associate this matter with Yu Ji's immortal arts. After all, trenching is also a common technique in fortifications. It's no surprise that Cao Jun would do so. But on the other hand, Xiao Bai, Duan Emei and others, who were the practitioners of the landslide and earth splitting technique, knew how Cao Jun's move had a strict impact on their cave tactics.

No, after inspecting the situation of Cao Jun's trenching, Xiao Bai and Duan Emei hurriedly found Yu Ji and reported the reason for the matter. Yu Ji, who was originally suffering from not being able to perform the Heaven Breaking Technique as soon as possible, and was unable to explain to Yuan Shao, suddenly shouted like an old cat with his tail stepped on, "Can't dig a tunnel? What are you kidding, Cao Jun just dug a small trench, and he didn't go deep into the ground. Wouldn't it be nice to wait for another one to be dug under it?"

"National teacher, please calm down." Xiao Bai explained to Yu Ji with a calm expression, "It is true that the trench dug by Cao Jun is not deep. Keguandu is located at the confluence of the three rivers of Guandu Water, Yin Gou Water (囧 ~ This is the real river name) and Pushui, and the groundwater level is high. The trench that Cao Cao's army was digging right now happened to come from the upper layer of the groundwater. If we dig any further, we will inevitably draw groundwater into the tunnel. Even if the tunnel is not flooded, it is difficult to ignite gunpowder in such a humid place. ”

After listening to Xiao Bai's words, Duan Emei also followed Yu Ji and said, "Think twice about the national teacher." Rather than fail the blast at that time, it is better to find an excuse to avoid this spell. Anyway, the immortal law pays attention to timing, and the timing is not right, and it is impossible to cast a spell, and you can't blame the national teacher for forgiving your majesty. ”

However, in the face of Xiao Bai and Duan Emei's persuasion, Yu Ji seemed quite stubborn, only to see him shake his head categorically with a wave of dust, "No, the old man has already boasted of Haikou in front of His Majesty." Now how can you break your promise, no matter how you use it, you and the two of you have to blow up Cao Ying for the old man"

In fact, if it were in the past, Yu Ji would not have forcibly let Xiao Bai and Duan Emei carry out the blasting so disregarding the conditions. On the contrary, he will also weigh the pros and cons to find the easiest city to start with, so as to add to Ping's military achievements. However, the "Tian Xu Collaboration Incident" just now made Yu Ji feel that Yuan Shao seemed to be a little suspicious. In particular, Yuan Shao's move to kill Tian Feng made Yu Ji worry about whether Yuan Shao would also want to take this opportunity to explore the secret technique. It was precisely because of these concerns that Yu Ji was anxious to use the Avalanche and Earth Cracking Technique to break through Cao Ying, so as to prove the authority of the spell and make Yuan Shao trust again.

As a technician, Xiao Bai didn't know Yu Ji's thoughts, he only knew Yu Ji's difficulties. However, just before Xiao Bai's seizure, Duan Emei pulled his sleeve in time, signaling him not to argue with Yu Ji. Immediately after Duan Emei, he took another step forward and bowed his hand to Yu Ji and said, "Since the national teacher is so insistent, then Emei and the others have no choice but to go all out and give it a go." ”

After Yu Ji received Duan Emei's reply, his mood calmed down a little. But seeing that he stroked his beard, he comforted the two of them widely, "The old man also knows that this matter is quite difficult. However, as long as you can help the old man cast the spell successfully, the old man will be rewarded for playing His Majesty. Even if you don't blow up the Cao Ying camp, as long as you make a shocking thunder, it will be done. ”

Duan Emei and Xiao Bai were not interested in Ji's so-called heavy rewards. They only follow the current conditions, and the chance of successful blasting is only 55%. However, since Yu Ji had said this, the two of them had to reluctantly embarrass them, and both arched their hands and said, "Oh." ”

But just as Duan Emei was about to turn around and leave the camp with Xiao Bai, Yu Ji suddenly stopped her and said, "Lord Duanqi, please stay." ”

Duan Emei motioned for Xiao Bai to go first, and turned back to Yu Ji respectfully and asked, "What does the national teacher command?" ”

Yu Ji didn't answer Duan Emei immediately, but after seeing Xiao Bai leave, he waved to Duan Emei and asked, "Lord Duanqi, what's wrong with Tian Feng?" ”

Duan E's eyebrows heard Yu Ji mention Tian Feng, and her heart couldn't help sinking. It turned out that Yu Ji did not stop there after using Xiao Bai's forged documents to frame Tian Feng. Yu Ji, who was afraid that Tian Feng would reveal the secret, asked Duan Emei to secretly send someone to assassinate Tian Feng in order to cut the grass and eradicate the roots. Therefore, when Yu Ji asked Tian Feng at this time, he was naturally not concerned about Tian Feng, but asked Duan Emei how prepared for the assassination operation. At this moment, facing Yu Ji with murderous intent, Duan Emei finally replied with low eyebrows, "The national teacher can rest assured. The autumn flood of the Yellow River is imminent, and it is not surprising that one or two ships will capsize. ”

Yu Ji listened to Duan Emei's reply, and a murderous smile suddenly appeared on his face, "Lord Duan Qi is reasonable. If Tian Feng encounters a storm, it is also his fate. ”

Duan Emei saw that Yu Ji believed it, so she bowed down again and asked Yu Ji, "Does the national teacher have any other orders?" ”

"The fewer people who do this, the better." Yu Ji reminded Duan Emei again.

"Emei knows."

Duan Emei said that he left Yu Ji's camp alone. But she never thought that as soon as she returned to the camp of the Five Elements Escape Banner, Xiao Bai, who had been waiting for a long time, hurriedly chased after her and whispered to her, "Emei really plans to act according to Yu Ji's words?" Know that the odds are not great. ”

Duan Emei glanced around, and after no one paid attention to the two of them, she stopped and raised her eyebrows slightly and asked, "Does Zilang want to obey Yu Ji like this?" ”

Xiao Bai asked suspiciously, "What do you mean?" ”

Zilang said that the odds were not good. When the time comes, it's not surprising that there will be an accident and an injury. Duan E frowned, and the corners of her mouth curved into a sly arc.

Xiao Bai reminded Duan Emei that if he couldn't come back, he would be sorry for his identity as the owner of the Earth Escape Banner. However, Xiao Bai was worried about Duan Emei, "What about Emei?" ”

"Zilang doesn't have to worry about me." Duan Emei touched the blindfold on her face and said confidently, "After the matter is completed, I have my own way to get out." ”

In the fourth year of Jian'an (199), at the end of June, Cao Cao, who had completed the trench fortifications, took the initiative to send troops to fight Yuan Shao, but without achieving results, he retreated to the camp and could not hold out. And released the words that he had mastered the method of cracking the technique of "Heaven Collapse and Earth Cracking", and Yuan Shao could not re-attack the Cao army's camp.

In the face of Cao Cao's naked provocation, Yuan Shao naturally couldn't sit idly by. On the second day of Cao Cao's exemption card, Yuan Shao ordered the archers to fire arrows at Cao's camp on top of the arrow tower. Between the first and two battalions, arrows rained down, and the soldiers of the Cao army walked in the camp, and even had to use shields to block the flying arrows. However, Cao Cao was not intimidated by Yuan Shao's unhurried attack of ten thousand arrows regardless of the cost. Instead, he immediately launched a thunderbolt that had been prepared for a long time, fired stones, and destroyed Yuan Shao's arrow towers on top of the earth mountain one by one. In response, Yuan Shaojun naturally launched his own trebuchet, but in terms of power and range, it could not be compared with Cao Jun's thunderbolt. A few rounds later, Yuan Shao's trebuchet was destroyed by the Thunderbolt Rider along with his turret.

In the first round of offensive and defensive battles, he suffered such a defeat, which made Yuan Shao, who was originally arrogant, a little annoyed and angry. While he scolded his subordinates for failing to fight with all their might, he also found Yu Ji again and asked him when he could open the altar and ask the Yellow Emperor to appear and descend the art of heaven and earth cracking. Under Yuan Shao's repeated pressure, Yu Ji had to agree to Yuan Shao's spell in the middle of July.

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