Chu Feng's butterfly's wings flapped too much.

An iron furnace can definitely change a lot of things, at least after Cao Cao saw the effect of this iron furnace, he thought of the soldiers of the whole army, and also thought of the people outside Dongjun who were still freezing.

"It's a good thing, it's not an exaggeration to call it an artifact, the whole room is warm."

Cao Cao felt the temperature in the room and couldn't help but sigh.

Xun Yu also praised on the side: "The key is that there is no smoke and dust, and there will be no smoke in the room, and there will be no open flames, so I am worried about the fire."

As long as this iron stove is used carefully, its safety problem is not big, and the stove can also be used to boil water or cook, which is very convenient. ”

"Chu Xiaolangjun, I didn't expect you to have the forging technique of the loser, I don't know if you have that kind of forging technique that is relatively strong, and you can improve the weapon, it is said that the Qin Emperor had the help of the loser back then, so that the Black Armor Xuanjun was powerful.

Mojia organs, wood and stone walking; Bronze opened, to ask the public to lose. That divine bow and crossbow, hundred refining steel, etc. are all forged books of public losers, if there is this kind of forging technique, the quality of our weapons will definitely be able to go to the next level. ”

Chu Feng shrugged his shoulders and replied, "What kind of forging technique do I have there, this iron furnace was also thought up according to the principle of the rural earthen stove.

Usually if the earthen stove burns very strongly, the temperature of the kitchen will be very high after a long time, so I wondered why I couldn't build such a heating tool in the room.

Later, after several experiments, I came up with this iron furnace, as for the forging technique of the public loser, I heard that it has been slowly lost since the Qin Dynasty, and maybe there are still descendants of the public loser alive, the lord may wish to inquire in many ways and recruit such people. ”

The fact that everyone who was still interested was somewhat disappointed, but Chu Feng's ability to think of such an iron furnace was enough to show that his intelligence was high.

"Well, but if you can think of such a way to keep us warm in winter, so that we don't suffer from the cold in winter, and so that the soldiers can also get a good night's sleep, it is a great merit, and I will be rewarded."

Cao Cao was also a little disappointed, but he didn't show it, and he still appreciated Chu Feng's intelligence very much.

And with Cao Cao's support, this heating artifact immediately became popular, and the first person to eat crabs will naturally earn it.

In this era, although there is no intellectual property protection law or patent protection, there is a sense of patent, your craft is your craft, and those who dare to steal other people's crafts are cut off from their wealth.

Only those with strong backgrounds will not worry, and ordinary people still dare not steal the skills of others.

It shows that the iron stove business, there are only a few in the entire East County doing it, and if others dare to point fingers, they will definitely be jointly attacked by these families, and if you don't want to die, you can do it, but you will definitely not live for a few days.

Although there are only a few families in this business, don't underestimate the ability of these families, iron stoves have begun to prevail in Dongjun and even other places.

In the era when there was no cotton, no padded jackets, and no down jackets, the cold of winter often caused people to freeze to death.

So, with such a heating artifact in winter, it is equivalent to having a guarantee of life.

But all people whose lives are still nourishing can buy iron stoves for gritting their teeth, and in the era of strict control of iron and salt, each family can only have a few iron stoves.

And some people, in order to save money, secretly collect iron tools, and then ask craftsmen to melt these iron tools and forge an iron furnace.

With an iron stove, the whole room is warm, and you don't have to endure the cold when you work.

When you get home, there will be a fire to warm up the room.

With the guarantee of warmth, Chu Feng began to write out the books he had read in Chang'an, those books that might disappear in the long river of history, and he was worried that if it took a long time, he might still forget it.

While I can still remember it now, and still have free time, it is also a great credit to write these books silently.

Cai Yong, who was already not very hopeful about his treasured books, was so happy that he didn't know how to express his joy after seeing the few books written by Chu Fengmo.

I am also more and more appreciative of Chu Feng, so many books, Chu Feng can memorize them, how strong is this memory.

In order not to make outsiders, especially others, jealous, Chu Feng still talked to Cai Yong with kind words and asked him to keep it secret.

And Cai Yong also nodded and agreed, but within a few days, Cai Yan also knew Chu Feng's strong memory.

Cai Yong felt that Cai Yan was not an outsider, and he would not be afraid, let alone talk nonsense, and he had other thoughts.

Cai Yan was surprised by Chu Feng's memory, and after knowing Chu Feng's thoughts, he also thought about writing out the books he had read before and the articles he had seen, and organizing them into a book order.

The relationship between the two has already gone further, and now they have a common goal, and sometimes they have a common topic together.

"I saw this rhythm from a good sister in the past, and I don't remember it very clearly.

But it's definitely a rarity, you see, if there is an impression, I want to make it up. ”

Cai Yan handed over a roll of bamboo slips, on which is the record of the rhythm, the rhythm at this time is the palace merchant horn feather emblem, etc., the relatively simple rhythm.

Chu Feng took it and looked at it for a while, searching in his head, but he didn't find that there was exactly the same rhythm score, but there were similar.

"Wait a minute, I'll write out my impression first, then compare, and finally fill it in, you pop it out, see if it's completely correct according to this score, and finally modify it."

Cai Yan nodded, "Hmm".

Chu Feng said that he had a lot of rhythms in his mind, but some of them were incomplete, so the two of them worked together to make up for them.

Cai Yan played the piano, and Chu Feng drank tea.

Chu Feng didn't know much about the knowledge of music, but under the teaching of Cai Yan and Cai Yong, he was still able to play a few tunes on the piano.

Cai Yan still plays the piano very well, the key is that the posture is very good, Chu Feng has been immersed in it, even if Cai Yan plays it wrong, he doesn't know.

Looking at Chu Feng looking at himself stupidly, Cai Yan's face was slightly red, but thinking about his fate, his face was a little pale.

can only put her emotions on the score, as for Chu Feng, she doesn't want to say anything, of course she won't blame.

Because she felt that blaming her would make the relationship between the two people separated, it was still so good, respectful of each other, she regarded him as a junior brother, and it was best for him to treat her as a senior sister.

The two of them were originally sisters and brothers, and Cai Yan hoped that this relationship could be maintained forever.

However, who thinks the future will be like that?