Liu He saw that Wen Zhong and Xue Rengui, the two top commanders, had no choice, so he felt that he should abandon ancient ideas and use modern knowledge to break the situation.

But there is also a lot of modern knowledge, and it is extremely complicated, and Liu He couldn't find any good way for a while.

I had no choice but to wait in a hurry, waiting for a good opportunity, while thinking about what tactics to use to break through Yan Gang's street deployment.

Liu He naturally couldn't be in the barracks all day if he wanted to break the situation, so he deliberately came to the city gate.

The city gate of Xu Wuxian is not very high, and it is summer, and it is extremely hot under the residual sun.

Yan Yi saw Liu He running to the city gate, worried about the loss, and kept following Liu He, Yan Yi saw Liu He frowning all the time, and said: "Lord, the matter of breaking the situation, it is so simple, you don't have to be like this, maybe you relax and think of a way."

Liu He also smiled bitterly when he saw Yan Yi say this, he was not the lord, so he naturally didn't know this, and he also wanted to relax, but the longer it dragged on now, the more unfavorable it would be for them.

The Xiongnu army just wanted to take advantage, and now when they saw Gongsun Zan leading the army arrive, they might immediately retreat.

At that time, Gongsun Zhan gathered with the army and Yan Gang and others, and the Youzhou army would have 110,000, and the battle situation would be in trouble.

Yan Yi saw that Liu He was not comforted by himself, and he hurriedly scratched his head, if Yan Er was there, he might be able to comfort the lord.

Yan Yi also knew that with Liu He's force, it was impossible for Yan Gang's subordinates to hurt Liu He, so he had to mutter: "Lord, it's nothing, I'll leave first, I just knew that there is a herb outside Xu Wucheng's city, which is a good medicine for treating scars recorded in the medical book of Camp Commander Li (Li Shizhen), I will dig it now, so as not to use it in the future."

Liu He nodded, he knew that there were a lot of good medicines in Youbeiping County, which were not available in Liaodong at all, and in order to let Li Shizhen have enough herbs, Liu He even issued a reward order, as long as some rare herbs were brought, they could be exchanged for money.

Just when Yan Yi was about to leave, Liu He hurriedly pulled him and said, "What did you just say?"

Yan Yi was stunned for a while, feeling that the lord was so strange now, thought about it, uncertain, and said in a questioning tone: "I'm going to dig herbs?"

"Hahaha." Liu He was instantly overjoyed, and hurriedly patted Yan Yi's shoulder and laughed.

Yan Yi was even more puzzled, not understanding why Liu He was laughing, but worried that Liu He would not have an accident.

Thinking of this, Yan Yi showed an anxious look, and just wanted to ask Liu He if he was okay, Liu He took the initiative to shout: "I have thought of a way, I have thought of a way."

Yan Yi was stunned at first, and then he was also overjoyed, and hurriedly asked, "Really?"

"Let's go back first, Yan Yi, you go and inform them first."

…………

Liu He had been waiting for them for a while, and the generals hadn't thought of a good way, so they planned to rest first, after all, they were tired enough in the past few days.

Now that he saw Liu He and thought of a way, he hurried over, but Liu He felt that he had been waiting for a long time.

Before the generals could ask, Liu He said directly: "Everyone, please take a look."

Liu He took some dirt and said to everyone: "It's summer now, but Youbeiping and the counties of Liaodong just happen to be melting the ice and snow, and this is just a good opportunity for us."

Xue Rengui and Wen Zhong frowned, as if they had thought of something, but they loomed and failed to grasp the key.

Except for them, everyone else was confused, and they didn't know what the good opportunity Liu He was talking about, and what the melting of ice and snow had to do with the soil.

Liu He also smiled when he saw that everyone didn't understand, and this method can be known to everyone in the future.

So Liu He hurriedly said: "Now the soil in Xu Wuxian is just soft mud at this time, and we can dig the passage directly, directly dig through the back of the defenders of Youzhou, so that we can attack directly from behind!"

The generals showed stunned looks, including Wen Zhong, Xue Rengui and others, how could this be?

Liu He was also startled when he saw that they looked like they couldn't do it, and looked at the two commanders beside him.

Wen Zhong, as the commander of the greedy wolf army, naturally wanted to be the first to speak, looked at Liu He, and arched his hand and said: "Lord, I have never heard of this plan, but now that there is a way, we should give it a try, after all, if we can succeed, we can take the entire Youbeiping."

Liu He also looked at Xue Rengui, Xue Rengui thought about it, and quickly stood up and said: "Lord, this plan should be as General Wen said, and the last general also thinks that it can be tried."

When the generals saw that the two generals agreed, and that they wanted to give it a try, they all agreed.

Seeing that all the generals agreed, Liu He smiled brightly, and immediately ordered them to prepare their tools, find a good direction and location, and start digging tunnels.

…………

After four or five days, Liu He found Wen Zhong to find out how the tunnel was dug.

Wen Zhong was digging in the dark ground himself, and when he heard Liu He coming to find him, he hurriedly said: "Lord, now, it may take half a day to directly cross Yan Gang's headquarters and reach behind them."

"However, this passage can't accommodate too many people, it can only pass a few hundred people at a time, and if it is discovered by the Youzhou army, it will be very troublesome."

Liu He nodded, there is no way, digging a passage underground, it can't be too big, otherwise it will collapse, and the elite soldiers can only be put over first.

It's just that Ran Min and the beggar army are suffering, and they are going to be sent out again, but Ran Min already knew about it, and he began to let go.

And Yan Gang has not been idle in the past few days, he and Shan Jing both know that now Liu and them are not attacking, they are just thinking of a way, although their deployment is no longer breakable, but they dare not be careless if they sail the ship carefully.

Now Yan Gang is in charge of managing the streets, and Shan Jing is responsible for leading everyone around to find loopholes, and Zou Dan has been seriously injured, and he fainted before, and now he is sent back to Zhuo County.

Liu He received the information, the passage had been opened, and it was directly a certain compound in the city, and Yan Yun Eighteen had already gone in to explore, and did not find any problems.

Now I came to ask Liu He if he would send the army over, and Liu He hurriedly asked the soldiers to follow.

He also put on his armor again, and entered the passage with the Heavenly Dragon Halberd in his hand.

This time, Liu He planned to let Wen Zhong command the heart of the army, and then Ran Min, Xue Rengui, Yan Rou and others and the beggar army went over, dragged the ballista and the Youzhou army, and let the greedy wolf army kill them.

Liu He believed that himself, Ran Min, and Xue Rengui's force was enough to disrupt the deployment of the Youzhou army, and then successfully took Xu Wuxian.

As soon as Xu Wuxian was taken, Youbeiping had no troops to block Liu He's army, and he could also choose from multiple options, both to attack Yuyang and to enter Daijun.