"Brother, what does my dad mean?" Cheng Huaimo touched his head, looking puzzled.

"I think your father agrees to you go to the military academy." Zhang Nan guessed with confusion.

"But why does my father look so happy? It's not his personality." Cheng Huaimo asked foolishly.

"I guess your father is happy to see you growing so fast, but you have to listen to your father and train hard. Look at the competition just now, your father killed you with one move. If you are on the battlefield, aren't you going to die?" Zhang Nan remembered the powerful aura that burst out from Cheng Yaojin just now, which made him breathless, and Cheng Huaimu couldn't move. It was really amazing.

I have never seen blood or even went to the battlefield, and I can tell it out in one go.

"Well, brother, I understand. I will work hard, thank you." Cheng Huaimo said with a smile.

"You are not thanking me, but your father. Why are you still standing there? Why don't you go home with your father?" Zhang Nan smiled, picked up the camouflage uniform thrown on the ground, and handed it to Cheng Huaimu. Cheng Huaimu took it over, smiled and thanked him again, and then chased him out.

Not long after he sent Cheng Huaimo out, Su Wen came over to report again.

"Master, Master Wei Tianwu, Minister of Works, is here to visit. This is a famous post." After Su Wen said that, he handed the famous post to Zhang Nan.

Zhang Nan took the famous post and said, "Come in quickly and wait for me in the hall." After Zhang Nan finished speaking, Su Wen turned around and walked towards the gate, and Zhang Nan started talking to the system.

"System, is there any design drawings for blast furnace iron smelting?" Zhang Nan asked.

"Yes, given that the host search items did not have epoch-making technology, the design drawing only sold 10,000 points." The system said without any emotion.

"Ahem, how much do you say?" Zhang Nan suspected that something was wrong with his ear. The design drawing of a blast furnace iron smelting actually cost 10,000 points, and it was not as if epoch-making technology had appeared.

"If the host cannot afford points, the system intelligently recommends the Ming Dynasty's vertical furnace iron-making method. The principle remains unchanged, but the price is low, given that the host is currently in an era that is easy to build." The system said.

"Then what kind of vertical furnace iron smelting method requires how many points?" Zhang Nan asked carefully.

"This method only requires 4,000 points, and gives the host a 100-to-one model, which facilitates the host's construction." The system said thoughtfully.

"Okay okay, that's it. I want to redeem it. It's just 4,000 points. It's a small problem. But you want to write this design drawing so that the people of the Tang Dynasty can understand it. You have to translate the translation into place." After Zhang Nan finished speaking, he saw that 4,000 points were missing on his account. Zhang Nan, who was distressed, thrust. It's really not a matter of lightning up the Tang Dynasty's technology tree overnight. First of all, the points in all aspects are a big problem.

"After the redemption, the design drawings and model hosts can extract them by themselves." After the system said that, Zhang Nan quickly walked to the front hall.

Wei Tianwu sat in Zhang Nan's front hall, looking at the various objects in Zhang Nan's front hall, many things that were unheard of. Suddenly, a small thing attracted Wei Tianwu's attention. Even the tea that Su Wen gave him was forgot to drink.

"This is just a small toy. If Lord Wei likes it, he can take it away." Zhang Nan suddenly said, frightening Wei Tianwu.

"Oh, Lord Zhang, you're scared me to death, but what did Lord Zhang say? This is a small toy?" Wei Tianwu pointed to the Rubik's Cube placed on the table.

"Yes, that's right, it's just a toy. Lord Wei can try it by himself. This thing can be rotated." Zhang Nan raised his hand and signaled that Wei Tianwu could try it by himself.

Wei Tianwu was not polite, so he picked up the Rubik's Cube and turned it on. Although Wei Tianwu was the Minister of Works, he had no resistance to these technological things. Some people like money, some people like power, some people like beauty, and Wei Tianwu is no exception. However, what Wei Tianwu likes is freshness, or what he likes is technology.

Wei Tianwu turned the Rubik's Cube and asked, "Mr. Zhang, is this toy going to match each color together?" I have to say that Wei Tianwu's observation ability is still very powerful.

"Yes, that's right, but when you fight one side and then fight the other side, you will disrupt the first side. So, how to not disrupt the front side when fighting the second side is the essence of this toy." Zhang Nan said with a smile.

After listening to Zhang Nan's introduction, Wei Tianwu began to think, but no matter how Wei Tianwu turned, he couldn't even play the first side. Wei Tianwu smiled and put down the Rubik's Cube in his hand.

"The adults in this court said that although Lord Zhang is not in the court, his influence is not small at all, and he can even change the emperor's mind. I used to think that this was just a praising and killing Lord Zhang, but I didn't expect that this was nothing wrong." Wei Tianwu said with a smile.

"Hey, Lord Wei can't say that. I'm just a little man. As for changing the emperor's mind, I can't say anything." Zhang Nan reminded.

"Ah, yes, I will make a mistake in the next moment. Lord Zhang, don't be surprised." Wei Tianwu knew that this had been said a little too much, so he quickly said.

"It's okay, Lord Wei remember not to say anything again in the future." Zhang Nan said.

"By the way, I am here to visit Lord Zhang today for a sentence that Lord Zhang said in the court that day." Wei Tianwu smiled. "Mr. Zhang made a bold statement in the court that day, saying that there is an emerging method of iron smelting that can increase the iron output of our Tang Dynasty to 150,000 tons. It is really a passionate thing, so today I will ask this Lord Zhang's new method of iron smelting." Wei Tianwu is now familiar with the tonnage system proposed by Zhang Nan that day.

"Does Lord Wei think these words are just talking nonsense?" Zhang Nan joked. After all, the output of this steel is so many times higher, which is really not very convincing.

"To be honest, I just thought that what Lord Zhang said could not be realized, but after seeing Lord Zhang's toys, I believed it a little again." Wei Tianwu smiled.

"This is not a nonsense. To be honest, the drawings of this new iron smelting method have been drawn below, and a model that has been reduced by a hundred times is also made." Zhang Nan said confidently.

"Oh? Lord Zhang has such ability, which really makes me look at him with admiration. I wonder if the drawing can be borrowed from the next view?" Wei Tianwu said.
Chapter completed!