Li Er and other ministers are very interested in these animals, and Zhang Nan is a little bit closer, after all, some of these animals Zhang Nan has never seen a living thing, but Zhang Nan has watched a lot of videos on the Internet.

So Zhang Nan felt bored after watching it for a while.

After Comrade Li Er finished visiting these animals, Li Er ordered all these animals to be locked up in a special place in the palace to keep animals. In fact, every emperor's palace will have such a place for raising some relatively large or auspicious animals.

After seeing this group of animals, Comrade Li Er let Zhang Nan go home, after all, Datang's top priority now is to vigorously develop science and technology, as for other things, they are all trivial.

Even if the country that had a naval war with Datang wanted to fight Datang, it would be impossible to fight it in five or six years, after all, it was too far away.

Zhang Nan left the palace and did not go back to the house directly, but went directly to the Ministry of Heavenly Engineering, because now he doesn't know where Datang's technology has developed, although the Ministry of Heavenly Engineering has successfully manufactured engines and coal cars, but that time is also a little early.

When he came to the Tiangong Department, Zhang Nan had not yet walked into Mozu's office when he heard the sound of a quarrel coming from Mozu's office.

"How many times have I said that you are not allowed to use the machines in the Heavenly Workers Department to make irrelevant things." Although Mo Zu was reproaching, Zhang Nan could tell that he was not too angry.

"Ancestor, what you said, we are craftsmen, if we don't make the real thing, how can we know if the design on the drawings is correct?" A young voice came from inside the office.

"Nonsense, can I not know such a simple truth? It's just that you look at how much material you've wasted recently, you have used more than 100 catties of high-quality steel at least alone, if you make a big piece, I won't say anything, but look at what you have made? Just a few pipes made of steel, even if you make steel pipes, that's fine, look at what you're doing, you put gunpowder in it, and the good steel pipes will blow up at every turn, what are you trying to do? ”

"This is all the idea that Lord Zhang gave me, Zhang Da made a thunderbolt, but that is too backward, and it can only be used once, I thought if I could make a thing to use this thing repeatedly, wouldn't this greatly improve the combat power?"

"If you want to create something new, the old man does not object, the old man not only does not object, but also strongly supports it, but you are the one who will take over the old man in charge of the ink gate in the future, can you be a little serious in a day, you have a day to do this, think about how to improve the gold and stone machine is real, you changed the gold and stone machine well, and got the certificate of a first-class craftsman, then you can do whatever you want."

"How can this be? Ancestor, you don't know, how can this kind of thing be so easy to improve? And I'm all focused on this thing right now. As the young man finished speaking, the sound of metal colliding was heard inside.

"Do you know that you have blown up Xiao Liuzi's hand by making this thing? Do you want to blow up your hand one day? Mozu's voice sank.

At this time, there was no sound in the office, and after a long time, the young man's voice came out again.

"Xiao Liuzi's incident was an accident, it was my responsibility, I asked him to add too much gunpowder, but this disease can't say that my things can't be realized." Young man.

"You ......"

The voice of Mo Zu's hatred of iron and steel came from inside, Zhang Nan listened outside for a long time, and finally knew what was going on, as soon as he heard that some people in the Tiangong Department had already begun to step towards hot weapons, Zhang Nan was immediately very happy.

Now without his reminder, Datang himself can complete the process from cold weapons to hot weapons.

"What's the matter, why is Mo Zu so angry." Zhang Nan smiled and pushed open the door of Mozu's office.

Ancestor Mo was stunned for a moment, and then said with a smile: "Isn't this a clear spring?" Why do you have time to come to the Ministry of Heavenly Engineering today? Could it be that the emperor wants to build something again? ”

Zhang Nan first looked at the young man who was silent standing at the desk, and then looked at the blackened steel pipe on the desk, and then said: "That's not it, I just came here today to see if there is anything new coming out in our Tiangong Department." ”

When Mo Zu heard this, he was stunned at first, and then said with a wry smile: "Qingquan, what you said, although the Heavenly Ministry is called the Heavenly Ministry of Labor, we are not craftsmen in the sky, where is it so simple to take out new things?" But if you have any new ideas, you can talk about them, and maybe we can make them. ”

After hearing this, Zhang Nan also smiled and said, "Who said no, isn't this?" After Zhang Nan finished speaking, he pointed to the steel pipe that had been blackened by gunpowder on the table.

"This? These pipes are something new. Mo Zu smiled and shook his head.

"Of course, I just heard it outside the door, this young man wants to use this thing to achieve the effect of thunder, this is a good idea." As soon as Zhang Nan's words fell, the young man who had been standing at the desk and had been silent suddenly raised his head.

His eyes flashed with excitement and he looked at Zhang Nan and said, "Master Zhang, do you really think so?!" Do you really think this approach is achievable? ”

After hearing this, Zhang Nan also smiled and said: "That's right, I do think this method is a good method, and it can be achieved." By the way, what's your name? ”

"If you go back to your lordship, I will call the soldiers." Bing Zhi saluted Zhang Nan and said.

"Soldiers? Haha, if you invent this thing and equip it to the army, then the soldiers of the Tang Dynasty will fight with the weapons you made, and you will really be a soldier in the end. As soon as Zhang Nan heard this name, he said with a smile.

When Bing Zhi heard Zhang Nan's approval of his invention, his face was happy at first, and then he quickly dimmed again, and said, "Where is it so simple? I've tried a lot of ways to make this thing, but every time I make something, it doesn't work as well as I want. ”

"Oh? Tell me what you're trying to achieve. Zhang Nan asked.

"I wanted to build a weapon that could be used again and again, but it was always unsuccessful, and I began to wonder if this thing could be used repeatedly." Bingzhi said.

Zhang Nan smiled slightly after hearing this, and then said: "Don't doubt it, it is impossible to succeed." ”

“......”