Liu Yi, who is thousands of miles away, naturally could not know about the fact that his own property in Jingzhou was robbed. Although it was a bit sad, it was also expected that things in this world are difficult to achieve everything. Summarizing experience in failure and then succeeding is the normal rule.

Although there are many people on Liu Bei's side now, it seems that the generals who can be seen are now Guan Ping and Yang Ren.

Guan Ping is now marching outside, not following Liu Bei, but is busy with a side army attacking the surrounding cities that are accessible, but for Guan Ping, this should be considered a good thing.

As for Liu Bei, there are many military generals, but not many can carry the banner of ability. In addition to Yang Ren, Huo Jun, who entered Shu with Liu Bei, was fine. The rest, such as Zhang Wei and Yang Bai who were taken from Hanzhong, were a little shady in Liu Yi's eyes.

Of course, there are not really no one. There are still many talented people among the surrendered generals in Shu. Li Yan and Wu Yi are all good talents, but the problem is that Liu Bei is not very brave to use these people now. And even if they really surrender, the surrender is surrender, and if they turn over, they will directly attack the former master. This is very criticized in character. Liu Zhang did not treat these people badly.

So most of the time, Liu Bei just asked these people about things in Shu, and would not directly let these people attack Liu Zhang.

After Liu Yi returned to the military camp, he did not immediately call the craftsmen to put his ideas into practice. It is not difficult to make things, but this time the weight is heavier than last time. If you do it completely according to the framework of the last time, don’t talk about whether it can be promoted after it is made. Whether the thirty-two wheels can support it is a problem.

Liu Yi's idea is very simple. Jingshen or most siege equipment are afraid of fire. The way to set fire in these days is nothing more than a piece of animal skin. But the problem is that the animal skin must be covered with seven or eight meters high and nearly ten meters wide, how much animal skin will be scrapped? This is not a tailor's problem, but a problem of material use or a disposable consumable, which is really a waste.

So Liu Yi wanted to try changing the animal skin to cement, but the cement seemed to be just a layer of it. But if such a big thing was applied, the weight would be not light. It would be difficult to do it with manpower alone, and the load-bearing ability of the wheels had to be considered.

After just estimating it, Liu Yi found that if the scale of the well is calculated, the weight wheels made cannot be supported first, and they have to be added, and at least 128 wheels need to be added. This is not the key, the key is that the manpower required is also greater.

Looking at the drawings, Liu Yi fell into deep thought. This thing must be streamlined. What Liu Yi needs now is to streamline what part? What part does Liu Beijun need most now?

After a long time, Liu Yi wiped out the part of the arrow tower. Although it was the biggest advantage of the Jingling, Liu Bei wanted to break the city rather than suppress the enemy. Moreover, the existence of the arrow tower occupied too much weight. It was a bamboo and wood structure before, but now it was covered with cement, the weight would be a bit terrifying. If it collapsed and fell, it could kill a group of people. On the battlefield, the ones that were killed were more likely to be his own soldiers.

This makes it simple. After going to the Arrow Tower, there is only one wall left. The ladder naturally does not need to use a gyro structure. In addition to the front, it requires fire protection, and the rear is no longer needed. This function is a bit like a ladder, but it does not conflict. In order to avoid being burned after the enemy is caught, the horizontal plate used to catch the enemy must be painted with cement on both sides.

However, in terms of weight, it is still a bit heavy, but within an acceptable range, in order to speed up the propulsion, each wheel involves two rotors, which can save effort and speed up the propulsion.

The drawings are designed, and the next step is to start.

Liu Yi ordered people to make cement, and at the same time began to set up the frame, and then built a horizontal plate and applied cement. The technical difficulty was not as delicate as the previous well structure. Overall, it looked like the upper part of a basketball frame, but there was no basket. The front was painted with cement to prevent fire. The most technical thing was the roller. While saving effort, it was also the function of the auxiliary wheel. The bearings were constantly broken. If the main wheel was broken, the auxiliary wheel could continue to support the frame forward.

"Boyuan, this is..." Liu Bei looked at the new siege weapons quietly placed in the military camp waiting to be dried, and looked at Liu Yi with a little confusion. From the front, it looked like a wall, still very strong. Of course, from the back, it was not the same thing.

"Just call it attacking the city wall!" Liu Yi actually wanted to talk about the firewall, but he didn't say it in the end. He pointed to the ladders and said with a smile. As long as he pushed to the city, this row of horizontal plates could directly connect to the city wall. Our soldiers rushed up through the ladder and could charge directly to the city wall.

Liu Yi pointed to a row of cement-painted places above and smiled. That row was a whole. Once it was put down, it would be equivalent to an additional landing surface with a length of stone. The wooden steps behind it were also serialized in pieces. At that time, they would not climb up the city wall but rushed up directly.

Liu Bei nodded silently. At least it could be seen that what Liu Yi had done before was a well. What he did this time gave people the feeling of a wall.

"Why don't you set up an arrow tower?" Wu Yi, who was following Liu Bei, frowned and said, "If there is an arrow tower, it will be more beneficial to siege the city?"

"These pillars cannot be supported. If all cement is applied, then this thing cannot be moved!" Liu Yi shook his head. If there is really conditions, how could he not make an arrow tower? If it is done, it is not only a arrow tower that needs to be painted with cement. In order to ensure balance and the wood can support it, there must also be cement behind it. At that time, it will really push a section of the city wall and run away. That scene is exciting.

Liu Bei nodded when he heard this. This thing was not difficult to understand. He looked at Liu Yi and smiled and said, "When will this thing be available?"

"It will take at least three days." Liu Yi thought for a while, it was just a layer of cement, and it didn't take long to harden, but it still needed to be tested.

After looking at it for a while, Liu Bei nodded and smiled, "With this thing, there is no strong city in the world!"

Climbing the city wall directly turns into charging towards the city wall. Although it also has a disadvantage, most of this disadvantage has been eliminated by the attack on the city wall, at least much easier than climbing the city wall.

Liu Yi estimated in his heart that this thing could not be transported for a long distance. If he really wanted to use this to attack the city, he would have to make one in each city, and the expenses would be second. However, it was completed because the moat had been leveled by Liu Bei. Moreover, Liu Yi had long discovered that the moat in Shu was relatively narrow. If he really encountered that kind of big city, the moat alone would be several meters. Before the moat was leveled, this thing would not be available.

Moreover, after taking down Shuzhong, the only enemies that will be Cao Cao and Sun Quan are left. I want to attack the city. This thing is too slow, and then there will be more large-scale collisions between troops and horses. Therefore, this thing is probably going to be used in the future when it is about to destroy a force like now.

Liu Yi arranged for Yang Ren and Huo Jun to discuss tactics with Liu Yi and how to exert the power of the attack wall. In the next three days, Liu Bei would still launch some symbolic attacks every day, but the battle situation was not fierce.

Three days later, when the same scene was staged outside Luo County again, Zhang Ren's eyes were a little solemn.

Although the catapult cart knocked out a lot of cement skin, it was only some. The turbid oil thrown on it did not make the siege wall burn like before. There were only charred traces in some places. As for the cement wall, there was no intention of spreading the fire until the turbid oil burned out.

Deng Xian, Liu Xi, Ling Bao and others were a little stunned. How could they fight?

Zhang Ren was not panicked and ordered Ling Bao to mobilize heavy troops to gather here, preparing to entangle with the enemy. Deng Xian and Liu Xi took the two sides to prevent Liu Bei's troops from coming up from other directions.

"Bang~"

The thick wooden board collapsed, and a lot of cement was shaken and cracked directly. Zhang Renzhi had already prepared an archer shot out from the cracked gap, but he did not see the enemy.

"Kill~"

A large number of Liu Bei's army rushed up the wide wooden ladder and rushed in on the horizontal board. Zhang Ren hurriedly ordered people to take it up, but Liu Bei's army continued to kill along the wooden ladder.

The fighting sounded more and more intense. Even though Zhang Ren and Ling Bao fought to the death to resist, they were still gradually occupied by Liu Bei's army and began to spread to both sides.

During the melee, Liu Xu was obscured by the rioters. In order to protect Zhang Ren, Ling Bao was shot and killed on the city wall. At this moment, the entire city wall turned into Shura hell. Blood stained the surrounding walls red. The bodies of the Shu army and Liu Bei army were mixed together, and there was no way to tell which corpse was.

"Justice and go back to Chengdu!" Deng Xian dragged his wounds to Zhang Ren. As Liu Bei's army occupied this section of the city wall, other places gradually could not resist it. Ladders continued to be raised, and more and more Liu Bei's army soldiers came up, and the city wall could not be defended when they saw it.

Once the city wall was lost, Luo County was not as many soldiers as Liu Bei, so how could it be able to resist the enemy?

Zhang Ren was unwilling to accept that he wanted to fight again, but was stopped by Deng Xian: "Go away quickly, at least one person needs to report the situation. Justice is far better than me. Go back to Chengdu and continue to worry about the lord! Otherwise, Liu Bei's army will kill Chengdu and have this thing, who can stop Liu Bei!?"

When Zhang Ren heard this, his eyes were filled with tears, his teeth were gritted, and he nodded without hesitation. He turned around and took his personal guards to take advantage of Liu Bei's army not yet fully entered the city. He left the south gate and headed straight for Shu County.

After all, Luo County was successfully captured with the help of the attack wall. Once Luo County was broken, the last barrier of Chengdu was gone. Liu Bei's army could march straight into Chengdu and reach Chengdu.
Chapter completed!