"What is a hot room?" Cui Qing has never heard of it, he thinks that he is a high eight buckets, after taking the Xiushi examination, he is not in a hurry to take the exam, but travels around Dachu to increase his knowledge, in addition to the things in the books, all kinds of civil industries, have been involved in the army, not for official positions, just want to learn more things.

Among the scribes, Cui Qing is an outlier, the art of iron smelting, benefiting the country and the people, so he really spent a lot of time, thinking that he is much more clever than the craftsman, but he has never heard of any hot rooms.

"If there is a blast, why is there no hot room?" Renault asked puzzledly, the hot room, it can be understood literally, how can it not be understood?

People with a little common sense know that the air blast can help combustion, but what can be blown in is cold air after all, and a hot room is built on the air duct, so that the hot air that blows in can greatly improve the efficiency of iron smelting, and it is much simpler.

When Renault finished explaining, Cui Qingru was hit hard and stood on the spot, feeling like he was empowered. There's really nothing puzzling about the hot room, but the world just didn't expect it.

"Mr. is talented, and the students are obedient. "Only one hot room took Cui Qing's heart, and after ten years of cold windows, he couldn't learn such knowledge in the book.

Sure enough, the more bland it is, the more reasonable.

"Okay, you're welcome. How much can this ink stone furnace smelt iron at one time?" asked Renault, the material he felt black was graphite, graphite crucibles have a long history, and the ignition point of this thing is extremely high, even on the earth there are occasional people who use it. It can withstand high temperatures of more than 3,600 degrees, and such flame retardant materials are not absent, but it is rare to see them cheaper than graphite.

Moreover, the thermal conductivity of graphite crucible is very good, which can quickly absorb a large amount of heat and shorten the smelting time.

"Mr. Hui, this is a ten-meter furnace base, which belongs to a medium-sized iron-smelting furnace, and the furnace can hold 300 catties of material at a time, and the iron is about 240 to 260 catties. Cui Qing really understands, these data come as soon as he opens his mouth, Renault is quite satisfied with what he hears, this is a talent.

It's just that the crucible is too small, only 300 catties of material at a time, and more than 200 catties of iron come out, laboratory-level output, no wonder Dachu lacks iron. As for steel, it is even more lacking, and there seems to be no name for steel in Dachu, which is called refined iron.

It takes only half a day to have a furnace, plus the processes of baking, replenishing, cleaning residues, and adding materials, at least one hour, so that it is calculated, and it will be two furnaces to the end.

"How many large iron-smelting furnaces are there at one time?" asked Renault with a frown.

"Large-scale feeding of 500, furnace of more than 400 iron. Cui Qing replied.

It's not much, but looking at the work of the craftsmen, it's kind of clear. It's not that you can't build a bigger furnace or furnace, but you can't do it if you build it.

There are no cranes or gantry cranes here, and it all depends on manpower. If you think about it, you can know that a furnace is not light, plus 500 catties of material, it is still a high temperature of thousands of degrees, and the smelting is completed, and there is no way to get out of the oven.

Renaud reminded himself not to underestimate the wisdom of the ancients, who just had little insight and not enough accumulated knowledge. It's not that they're stupid, it's that there's no way.

"How long will it take to build the furnace?" it was already the middle of the night, and Reynolds could see the deep exhaustion on the face of the craftsman, and in the distance, the woman had not yet slept, and looked over with her smaller child in her arms.

"Soon, in another hour, it will be almost the same time, and all that will be built is the base and the hearth of the furnace, and the furnace will be ready for tomorrow. In fact, Cui Qing was also quite tired, but he felt that he could still persevere.

"Alright then, after the hearth is built, let's rest. Let the food be prepared with hot soup, it is already starting to get cold this day, be careful not to get sick. After Renault finished speaking, he turned around and left with tiger teeth, he knew that he was here, it would only affect the progress, since he looked very professional, he didn't make a mess here.

Back in the room, send Huya to rest, this kid is not happy, saying that he is Renault's long-term follower, the main family does not sleep, where is the reason why he sleeps first. But he was still a child, and when he was growing up, Renault forced him to get out, close the door and light the lights, and Renault couldn't sleep at this time, pretending to be a stomach.

Find the animal skin paper, grind the ink and take the pen, and start painting on the paper, first the material pool, the crusher, the cooking stove, and the bamboo curtain. From time to time, I look through the novels in the central computer, and then add what I think of. After all, the things in the novel are too simple to write, and whoever wants to make paper according to what is written there will fail 100%.

Renault doesn't know much about papermaking, but he knows very well that the modern paper industry needs to use a lot of chemicals, but here, pure natural, there are no medicines, only the most primitive method of papermaking.

If it weren't for the increasingly red, swollen and painful buttocks in the past two days, Renault wouldn't have been in a hurry to stay awake in the middle of the night and play with this thing.

When the painting is finished, the paper-making process is written, and the sky is almost dawn outside. But looking at the five pieces of animal skin paper that he wrote and drawn, Renault was worried, with this play, can he really make paper? This is also too unreliable. If you don't have paper, you can't do it, and you will hurt your body if you hold your stool.

I was really tired, and even though I was very hungry, I still fell on the bed, and I slept well first. I know the direction, but if I really do it, the ghost will know when I will succeed.

After breakfast, the ninth princess took Si Ji and Si Wu to Renault's small courtyard, looked at the tiger teeth that were trembling slightly in front of her, and did not speak. She has long known that this is the long-term follower of her husband, and she has a life-saving grace for her husband.

Renaud rarely goes out, so naturally he doesn't know how famous he is in Dingjun City, let alone him, even Huya is unknown to everyone. Tiger sisters, if they want to do something when they go out, there is nothing they can't do.

"Sir...... The gentleman did not wake up until dawn and fell asleep. After a while, Huya plucked up the courage to say, after all, he is just a small person, but the princess of the empire in front of him, the identity gap is too big, and he can stand firm and speak clearly, or because he is used to seeing big people in the past few days, he has already kowtowed.

"You are a tiger tooth long, since Mr. has not woken up, let me go into the house to sprinkle and sweep, I will definitely not wake up Mr. The Ninth Princess said.

"This ......" Huya didn't know whether to let people in, the ninth princess is a noblewoman, a big noblewoman, but Mr. is also a nobleman, a nobleman, this nobleman and noblewoman's business, he really doesn't want to participate in it, but he is a long-term follower.

"Huya, you were there last night, this palace is now Mr.'s maid, sweeping the room for Mr. and sorting out books, it's my duty, why are you stopping me?" The ninth princess is in a very good mood, and she is also in the mood to joke with Huya, she can naturally see how difficult Huya is, she just wants to tease him, she knows, don't look at his size, in fact, he is only thirteen years old this year, and he is still a child.

Yes, Mr. agreed to let the ninth princess be a waitress, and it seems that he said a lot of things, and Mr. was not very happy at first, but then agreed. Huya didn't understand very well, but he knew that the ninth princess didn't lie to him.

"Okay, Ninth Princess, you can be gentle, don't make a noise to Mr. "Huya is quite uneasy.

The ninth princess smiled lightly: "It's a loyal one, deserve a reward." ”

Hearing the words of the Ninth Princess, Si Wu stepped forward, took out a gold coin from the small money bag he was carrying, and handed it to Huya.

Huya took the gold coin stupidly, and he didn't know how to thank him, and no one had rewarded him before. The money sent by the old gang leader, that is a monthly example, and occasionally give some medicinal herbs, that is love, there is nothing to reward or not.

Si Wu was about to walk over, and only then did he react, scratching his head, feeling that he couldn't ask for other people's money in vain: "Wait, I also have something for you." ”

As he spoke, he took out a gourd from his arms, unscrewed the mouth of the gourd, and poured out three life-saving pills from it: "This sister, these are for you to practice martial arts." ”

They are all people who practice martial arts, and they can be seen when they walk around that the Ninth Princess and Sister Si Ji have never practiced martial arts, and this Sister Si Wu has extraordinary strength, I am afraid that she is still above herself. He really can't see that Si Wu is an eight-rank master, and among the martial artists, he is already a big master.

"Life-preserving pill?" Before the pill arrived, Si Wu recognized it, took it and took a look, it was indeed a good life-preserving pill, and the material used was at least the three-leaf red pill.

The ninth princess was taken aback when she heard this, with her identity, the life-saving pill is naturally not rare, but it is rare. What kind of person is Huya? A child, a merchant guard, can easily send out three life-saving pills?

You must know that if you take it out for auction, these three life-saving pills, at least hundreds of gold coins, will have to be bought by people.

I used to think that as a princess, I wanted to make friends with the people around my husband, and let Si Wu give it a generous reward of a gold coin, but compared with the three life-saving pills, she was too stingy as a princess.

Is this medicine a life-saving pill that anyone can take out?

"It's too precious. The ninth princess stopped and said, Si Wu naturally knows that it is precious. Female officials like her have been selecting good materials since childhood, and they are piled up with various medicinal materials in the palace, and they have only one mission, to block the knife with their bodies when the princess is in trouble.

The more female officials like Si Wu, the more they understand the preciousness of the life-saving pill, the Great Chu Emperor is rich all over the world, and when distributing medicinal materials to them, he must also be careful with his calculations. Anyway, Si Wu has practiced to the eighth grade, and he has never handled the life-saving pill.

"Back to the princess, this is the elixir that Mr. gave us to practice martial arts, take one when you have nothing to do, it's not valuable. Huya waved his hand again and again, these days, he didn't know how many gourds he had eaten. Originally, Tiger Sister asked everyone to take ginseng, but the husband said that ginseng was not good, so they all ate this.

Sir, is it so good, the people around you can take the life-saving pill at will? The ninth princess and the two female officials were dumbfounded. The life-saving pill is not a medicinal material for practicing martial arts, okay, it is used to hang one's life and heal injuries.

"I thank you for Si Wu, take it. The ninth princess was very angry, and when she heard Huya say this, she ordered Si Wu to accept it, turned around and continued to walk towards the house.

"Si Ji, you go back and order Si Shan to prepare the food and warm it, and wait for Mr. to wake up and pass the meal. ”

"Yes. "The priest took the order and left.

Walking into the room lightly, the ninth princess looked down at the animal skin paper on the table at a glance......