Outside the Tai Chi Hall, there were many things piled on a carriage, which Luo Zhang had brought for experiments.

After leading the ministers and Li Shimin out of the Tai Chi Hall, Luo Zhang left alone and went about his business.

He directed the guards to unload the bags of cement produced after several days of preparation from the carriage, and also moved down the bricks fired in the brick kiln built in Nanshan, and started to straighten them.

He mixed cement and bricks, and it took Luo Zhang half an hour to build a wall that was as tall as a person.

"Your Majesty, this is the city wall I said. However, it will take a period of time to dry and solidify. If we look at it in a few days, this wall will be as strong as a barrier as I said!"

After building the wall, Luo Zhang clapped his hands, came to His Majesty and bowed.

Li Shimin stepped forward to check, pointed to the remaining cement on the ground and said, "What is this?"

"Your Majesty, this is cement. It is made of limestone, clay and iron ore powder. Adding water can make the glue tightly combined and unbreakable!"

"Then what is this?" Li Shimin pointed at the bricks.

Luo Zhang picked up a piece and said: "This is what I call the substitute for bricks and stones. I call it a brick. It is made of clay and fired in a high-temperature brick kiln. Except for the use of coal, there is nothing else."

cost!"

"No matter where you are, building a brick kiln can continuously fire these bricks. It is much simpler than transporting stones back and forth, which is time-consuming and laborious." Luo Zhang explained.

After hearing this, all the officials stepped forward one after another. One of them picked up a brick and looked at it. As expected, it was as hard as Luo Zhang said, and it was much lighter than a stone. They couldn't help but marveled, and the look in Luo Zhang's eyes also changed a little.

Already.

"The children of immortals are different. I'm afraid only Luo Zhang can come up with this kind of magical thing!"

"It's just that I don't know if the wall can live up to what he said!"

Li Shimin nodded and said: "We'll see in a few days. If what you say doesn't count, then the construction of the city will be abandoned!"

"Of course!" Luo Zhang said with a smile.

"By the way, Your Majesty, there is something you haven't seen yet!" Luo Zhang said and led everyone to an open space, where there was a lifting frame made of wood and many Luo Zhang himself.

Made of pulleys.

"What is this?" Li Shimin asked curiously.

"I call this a lifting frame. It can lift things dozens of times stronger. For example, the stone pier in front of you weighs a thousand kilograms. It is not difficult for us martial arts practitioners to lift it. But you asked a common man to lift it.

It's impossible to lift this thing up."

"But if this lifting frame is used, even ordinary people can easily lift it." Luo Zhang introduced.

After saying that, he asked the guards to bring in an ordinary citizen. After everyone checked, they found that he was indeed an ordinary citizen without any martial arts skills.

Luo Zhang explained to the people in front of everyone, and then asked the guards to tie up the stone pier weighing a thousand kilograms.

"Okay, you can pull it off." Luo Zhang said to the people.

The uneasy people followed what Luo Zhang said and pulled up a rope in front of them. As the pulley rotated, the stone pier that had been placed quietly on the ground actually lifted up with the people's tugging, and it was lifted off the ground by a foot.

As much as a foot.

"This is the weight frame I simply made. If the pull rod is higher, it can be lifted to a higher place. And here, we can turn the direction and send it to the place we want to send it!" Luo

Zhang said, pointing to the lifting frame.

At this moment, the square was already filled with exclamations of exclamation. They were all pointing at the stone piers that the people had pulled up and were astonished.

Those ordinary people without any force could actually pull up a huge boulder, which completely subverted their cognition.

"Luo Zhang, tell me, how did you do it? Isn't it amazing?" Cheng Yaojin pulled Luo Zhang and said.

"You don't understand this even after I say it. All you need to know is that it will make the people more powerful and participate in building the city without getting tired!" Luo Zhang said with a smile.

Li Shimin was even more amazed and stared at the lifting frame non-stop. This kind of thing was completely beyond Li Shimin's expectation.

I really can't figure out how Luo Zhang's head is so long that he can actually create such a thing.

The most excited people were the people from the Ministry of Works, who all looked at the crane with green eyes.
Chapter completed!