For everything that happened on the Xianbei Prairie, Liu Yuan was not clear at this time.

If he knew that Kebi could be forced to that point by Zhao Yun and the others, he would definitely be able to temporarily stretch his frowning brow.

The reason why Liu Yuan has such emotions is because his opponent seems to have become smarter during this time.

After several previous defeats, they no longer had any field battles with him.

Even if he sent his generals to fight, Cao Cao and the others on the opposite side ignored them at all, which made him feel helpless for a while.

Originally, he was still thinking that even if he couldn't defeat the opponent in the form of a fighting general or a fighting formation, he could swing his army to directly capture the opponent's city, but it turned out that he was wrong this time.

Cao Cao, a cunning guy, had already repaired the city in front of him.

Although from the outside, this is a city that does not look amazing, but as long as he waves his army to attack, the other party looks like an iron hedgehog.

During this time, he had lost nearly 5,000 of his men in order to attack the city in front of him, which was almost all of their previous battles.

Even so, none of his subordinates could climb the city wall in front of him, and even not long ago, Gan Ning led people to attack the city in person, and he almost died on the spot.

If it weren't for the fact that he possessed a rare Qihuang technique at that time, maybe he would have been lost in this battle, which made him scared when he thought about it.

In the following time, he and Cao Cao and others fell into an endless confrontation, as long as he did not take the initiative to attack the city, Cao Cao and the others would never send a single soldier out of the city.

During this time, he could say that he had thought of anything he could think of.

But the other party seems to be able to predict his actions in advance, and no matter what means he uses, the other party can resolve them one by one.

If he didn't know the strength of the other party's strategists, maybe he would suspect the existence of the other party's spies among his own people, Liu Yuan knew that this was a precursor to him who was about to lose his normal heart.

He has been trying to recover his emotions for the past few days.

He knew that only in this way would he be able to come up with a way to conquer the fortified city in front of him, but the situation he faced made it impossible for him to calm down at all.

Because in the past few days, he has received reports from his subordinates, and those princes who were still waiting and watching before have now begun to have some tendency to move.

If he can't defeat Cao Cao and the others in a short period of time, once those guys who are like grasses on the wall make up their minds, his Jizhou will be really dangerous at that time.

What gave him the most headache was that Lu Bu, the guy who had shrunk up since he was seriously injured, quietly came back when he had the most headache.

This guy didn't know what kind of panacea he had taken, but after this serious injury, his brain became brighter, and his mind was incredibly broad.

This guy didn't even care about his previous suspicions, and cooperated with Han Sui.

He let Han Sui's men and horses secretly enter the territory of Sizhou, and firmly tied all Zang Ba's men and horses to the territory of Sizhou.

And Lu Bu, a guy who is not willing to be lonely, jumps up and down to connect the princes who are still watching, hoping that they can follow him into his Jizhou.

Although Lu Bu's persuasion has not had much impact now, as time slowly passes, no one dares to pack a ticket for what will happen in the future.

Now this dangerous situation of the former wolf and the tiger, how can he Liu Yuan quickly calm his mind, after all, Jizhou at this time can't experience any wind and rain at all.

After all, Huang Zhong only has tens of thousands of recruits in his hands, and it's okay for these recruits to look scary, but letting them go to the battlefield is tantamount to a big joke!

Once there is any problem in Jizhou, it will definitely have an irreparable bad impact on itself.

Once parents, wives and children fall into danger, there are still a few people who can maintain a strong fighting spirit.

All of this requires him to defeat the alliance of princes in front of him in a short period of time, and only in this way can he turn the possible crisis into invisibility.

But this seems to be stuck in that dead knot again, how to break through the fortified city in front of him is still the most difficult problem he has to face.

Just when he had already thought that his brain was about to explode, suddenly Guo Jia walked in with a happy face, which made Liu Yuan seem to see a glimmer of light in the endless darkness.

It seems that Feng Xiao has an idea, otherwise he would never have come to meet him with such an expression at this time, and Liu Yuan couldn't help but be shocked when he thought of this possibility.

Sure enough, this time, Guo Jia did not disappoint him in any way.

This time he came to solve Liu Yuan's problems, and after thinking about it for a while, he finally thought of a way to solve the problem in front of him.

The method proposed by Guo Jia is actually not complicated, and they still use their old method, that is, the gunpowder that has been continuously improved by Liu Yuan and others to attack the opponent's city.

This made Liu Yuan's already stretched brows involuntarily screw together again.

They had also tried to attack each other's cities with gunpowder, but they didn't achieve much success.

I don't know where the other party got the news of gunpowder, this time Cao Cao deliberately ordered people to strengthen the walls of the city in front of him.

The gunpowder he sent to place could only shake the other party's wall a few times, and it didn't even collapse a single piece of masonry.

And that time, none of the men he sent to place the gunpowder escaped alive, and after escaping the initial shock, the other men shot and killed his men.

His baby-like Demomen were killed nearly a hundred in that battle, and he only had more than 500 such men.

Nearly one-fifth of the manpower was sacrificed at one time, which made Liu Yuan feel distressed for a while.

Now that Guo Jia has proposed to use gunpowder to attack the city, does it mean that he has forgotten the pain before?

Liu Yuan originally wanted to reprimand Guo Jia severely, but as Guo Jia spoke, Liu Yuan's brows not only stretched again, but also showed a smile on his face that he hadn't seen for many days.

In fact, it is not complicated to say Guo Jia's strategy, he just combined the two strategies into one, and they also tried to dig tunnels to attack the city after the gunpowder was not used before.

But the other party obviously thought of this possibility a long time ago, and they sent people to bury a few big men in the city early, specifically to prevent themselves from attacking the city from underground.

At that time, due to his own mistakes, the thousand robes that were drilled into the tunnel did not survive, which made him blame himself for a long time!

This time, Guo Jia's plan is to use the combination of gunpowder and tunnels to give Cao Cao and others a two-pronged attack!