Li Zhi brought back from Guangzhou is naturally a treasure in the sea.

And the most precious nature in the sea is pearls.

Chengyang and Xiao Zizi soon had a pearl necklace around their necks.

At this time, the two were playing with the necklace while listening to Li Zhi's experience in Guangzhou City.

When Li Zhi finished telling the sailor about the process of catching the whale, Empress Changsun and Li Lizhi were already dumbfounded.

It was the first time they had heard of such a huge creature in the world.

Especially when Li Zhi talked about the whale that almost overturned the Qianliu warship, he was so nervous that he forgot to breathe.

Empress Eldest Sun said in amazement: "Can such a huge thing be captured by my soldiers of the Tang Dynasty?" ”

Li Zhi said proudly: "At present, there is no possibility for all countries in the world except for my Datang. ”

Li Lizhen said: "In this way, isn't my Datang invincible in the world?" ”

Li Zhi said: "This is nature. ”

Of course, Li Zhi's words will not be untargeted.

Today, Datang's steelmaking technology is unique in the world.

Other countries have a lot of difficulty in producing a good steel knife.

And the people of Datang have been able to use various tools made of steel.

In addition, Li Su has already led people to research real explosives.

This is a great weapon of murder that few people even in the entire imperial court know.

This stuff, once used in war, will be a nightmare for the enemy.

When rifles and bullets are developed again, it means that Datang will officially enter the era of thermal weapons.

Li Shimin finished his work early today and summoned Li Chengqian and Li Tai to the Lizheng Hall to pick up Li Zhi's wind.

During the banquet, Li Zhi behaved very low-key, giving Li Chengqian enough face.

At this time, Li Zhi didn't dare to scream.

If Li Chengqian and the two were allowed to unite early, wouldn't it be easy to repeat the mistakes of Xuanwumen?

Li Zhi's low profile gave Li Chengqian and the two a chance to play.

Every time Li Shimin asked about politics during the banquet, the two of them were the first to answer questions.

And Li Zhi directly positioned himself as the sand monk in Journey to the West.

One moment the eldest brother is right, and the fourth brother has a good idea.

In the process of eating, Li Zhi found that Li Tai had improved a lot.

There were a few times when the recital was right, and I really got to the point.

For example, taking advantage of the slack time to build roads and dig canals.

Another example is the construction of canals and dams for farmers.

Li Zhi can see from here that Li Tai has definitely worked hard recently.

Because what he said was not just rhetoric, but really pointed out where priorities need to be prioritized.

This made Li Zhi also have to sigh that Li Tai's mind was really top-notch among the princes.

The day after Li Zhi returned to Chang'an City, he hurried to a secret base where he would be imprisoned.

Here, Cheng Yanjin, the general of the left leading army, personally arranged personnel to garrison.

All personnel are not allowed to enter or leave the paper.

Even the hairpin had to be pulled out during the body search to ensure that nothing was hidden in the hair.

It all started with a test explosion that took place in an out-of-town academy two months ago.

At that time, Li Su personally led people to test and detonate an explosive weighing about half a catty.

And what detonated it turned out to be another explosive.

The only people who witnessed the test explosion were Li Shimin and Li Jing, Cheng Yanjin and Wei Chi Jingde.

And the explosives, which were only less than half a catty, actually blew up a huge crater with a diameter of more than a zhang and a depth of more than a foot.

At that time, the crumbling earth and rocks covered the entire surrounding area of four or five feet.

The huge explosion startled Li Shimin and the others.

Even though they were all veterans of many battles, they couldn't suppress the panic in their hearts.

So from that day on, all those involved in the study of explosives were gathered here.

Even if it is like Cheng Yanjin and others, if they want to enter and exit here, they need to be checked.

At this time, Li Zhi came to the door of a laboratory accompanied by Cheng Yanjin.

He opened his arms and asked the soldiers at the door to search him.

Cheng Yanjin, who was on the side, saw it and said, "Your Highness is the one who personally proposed the law, so there is no need for this, right?" ”

Li Zhi opened his mouth and said: "Although this king has thought of a method, he has not made it himself, so he should follow the rules here. ”

Cheng Yanjin sighed after listening to Li Zhi's words.

The soldiers were then motioned for the two men to be examined.

Cheng Yanjin said while being searched: "Your Highness can set an example and make the minister's duties much easier!" ”

Li Zhi said: "Since the rules have been established, they should be strictly followed. ”

After hearing this, Cheng Yanjin nodded seriously.

With Li Zhi taking the lead, he can use this as an example when facing others in the future.

If someone relies on his identity to refuse to be examined, he has a reason to do so.

After a while, the two finally entered the laboratory.

There are no less than thirty people here who are seriously busy.

Some of these people are experimenting, while others are discussing production steps.

Going from the lab to mass production is quite a long process.

Each of these steps is broken down to design a dedicated device.

In this process, both the materials required for the equipment and the manufacturing methods need to be constantly discussed and experimented.

Therefore, the people here not only include a few disciples of Li Su, but also some young craftsmen who will be superintendents.

These people are not very old, and they are the best age to learn knowledge.

Their craftsmanship today may not be as good as that of the experienced masters.

But in time these people will become the absolute main force that will serve as prisoners.

They will change the existing way of production with new knowledge.

Precision parts that were previously hand-rubbed by experience are gradually being transformed into products that can be mass-produced using machines.

This process may be long, but it is a process that the Tang Dynasty must go through to transform from an agricultural civilization to an industrial civilization.

In the process, such a young team will continue to grow.

Li Zhi stayed here for a long time.

During this time, he used his experience to give a lot of advice to these people.

No matter how brilliant a mind is, it is not as good as real experience.

In his previous life, Li Zhi had seen countless devices that these people had never seen before.

So his ideas are much more comprehensive than these people.

When Li Zhi left here, he also underwent strict inspections.

This made those who were originally quite complaining suddenly lose their resentment.

A dignified prince, and even the originator of the study of things, must be examined.

What should they be angry about?

After Li Zhi left the laboratory, he immediately went to find Yuan Tiangang and Li Su.

Today, the students of the academy have learned a lot, and these people have the ability to teach students.

Next, he plans to start expanding the size of the enrollment so that more poor children can get an education.

He doesn't need these people to be able to memorize the Four Books and the Five Classics well.

I just hope that these people can become the engineers of the future...