Sometimes people are blindly obedient creatures, just like the old people who buy keys in modern times, they may not be useful in buying those things, and they may not necessarily eat them all.

But this thing was "everyone said it was OK", so they began to blindly follow the crowd and spent all their savings over the years. In the end, they had a very unhappy relationship with their children at home, but in fact the things they bought were of no use to them.

The same is true for Cheng Yaojin and Changsun Wuji. Seeing the concrete wall so strong, he didn't care whether it was useful or not at home. When his head was hot, he thought that he would use this thing to monastery wall.

Of course, Li Muyun did not object to such a thing. Anyway, if anyone takes the money, even if they don’t take it themselves, the money will be paid by the court. For him, the construction worker, it will be beneficial but not harmful.

However, just as the two old guys Cheng Yaojin and Changsun Wuji were fighting each other, another 'squeaking' sound came, attracting everyone's attention.

Li Muyun naturally heard the sound, and turned his head to find that at some point, the catapult that was placed on the side had been slowly pulled open to swing his arms, and the stone the size of a human head had been loaded, and it was about to enter the launch stage.

It's just a wall, what about it?

Li Muyun looked at the catapult and had to admire Li Shimin's persistence. He was indeed an emperor, and his spirit of not achieving his goal was really unwilling to accept it.

With a "swish" sound, before Li Muyun could react, the stone on the catapult had already flew up and smashed it onto the empty wall.

It has to be said that the damage caused by the catapult is indeed much stronger than that of the Eight Niu Crossbow. As the gravel splashed, everyone could clearly see that a small piece of head on the wall was smashed with fine patterns.

"Get on the rushing car, I can't do anything about this broken wall today!" The guy who was commanding was also a little furious, pulled off the hat on his head and threw it on the ground, cursing and commanded a group of imperial guards to push the rushing car that was preparing to be on the side in case.

The construction of the rushing car is actually extremely simple. It is a wooden rack with several wheels installed under it. On the rack above it is a rough log that is probably hugging two people.

This thing is generally used to impact the opponent's city wall or city gate. After dozens of people push it to the city, they gather their strength to pull the rope tied to the tail of the log, pull the log up, and then suddenly let go. Under the action of gravity, the log will crash into the city wall or city gate.

If you can't understand it, you can imagine the wooden pillar used by monks to hit the bell. The usage of rushing the car is actually the same as it.

Li Muyun looked at Yuchi Gong who had thrown his hat away and was speechless for a moment. Strangely, Bugang always felt that the guy who was commanding the crossbow and the catapult sounded a little familiar. It turned out to be this guy from a thief.

But now it seems that it is not the time to say this. The wall of the palace resisted the attacks of the Baniu Crossbow and the catapult. Everyone present was very curious whether the wall could withstand the attacks of the car.

Li Jing, Li Ji, Cheng Yaojin... and some military generals had realized the importance of this concrete wall at this time. One and two followed Yuchi Gong to squeeze all the civil servants who were watching the heat.

Li Shimin, the Emperor of the Tang Dynasty, was actually quite nervous. Although he was mentally prepared for the strength of the concrete wall, he was still shocked just now.

You know, this wall is only three feet thick, and it has resisted the attacks of the crossbow and the catapult. If this thing is used on the city wall, who else can break the city of the Tang Dynasty?

Not to mention that the speed of construction of this thing is almost unimaginable. The wall of the palace was basically completed in just half a month. This speed was almost beyond everyone's imagination.

With fast construction speed and high defense strength, what else is more suitable for building city walls than this thing? If the Tang Dynasty's city walls are replaced with this thing, or if this thing is used to build cities on the grassland, this will have an extremely powerful effect on strengthening the Tang Dynasty's rule over the northern desert.

"Dongdongdongdong..." The rushing car was finally transported to the place. Under the operation of a group of imperial guards, it hit the newly built wall one after another.

But what surprised everyone was that in their opinion, the wall that was supposed to be able to withstand three to four impacts actually resisted the continuous impact of the rushing car. Except for some gravel that was splashed everywhere, after more than ten impacts, the wall did not seem to have suffered any major damage. However, the soil layer under everyone's feet was a little loose, and as the rushing car hit again and again, the loosening became more and more powerful.

What are the characteristics of cement structure? It is particularly stress-resistant! If some iron bars are added to it to enhance its stretchability, it will become a typical iron bar concrete. How could this thing used to prevent artillery attacks in later wars?

Li Muyun did not believe that these people could smash one-meter-thick iron strip concrete with wooden tools, at least they did not believe that they could handle this matter within half an hour.

And if it takes more than half an hour, no, even now, this wall has basically withstood the test. Even if the picky emperor comes, he cannot say a word of no. This can be seen from the group of people around him.

Of course, the people around Li Muyun, including Yuchi Gong and others, these Tang Dynasty madmen have become interested in the wall, and it seems that they will not be able to stop without smashing the wall open.

But the wall was completely integrated, with iron bars connected in the middle. It was not that easy to completely smash it open. After finally smashing it many times, the madmen of the Tang Dynasty realized the fact that they could not completely destroy the wall, and let go of the imperial guards who were about to be exhausted.

At this time, it was already noon and everyone had been busy around the wall for nearly an hour and a half. Seeing that everyone had given up, Li Shimin took a deep breath and said to Yuchi Gong who was standing aside, gritting his teeth and staring at the wall: "Jingde, go find some gunpowder and blow it up for me!"
Chapter completed!