After a long exam for more than half an hour, Bai Jing finally spoke, more than an hour, Renault was so bored waiting, no wonder when he was in a daze before, the eyes of the people around him were wrong, not to mention, he really looked like a secret master.

It's not that Renault wants to disguise himself, Da Chu is too boring, if it is on Earth, he can think while playing games, or have a bottle of beer, or think while watching a movie, but there is nothing here, he can only be in a daze like an idiot.

"How far can it be?" asked Bai Jing.

Renault pondered for three seconds, he found that this is a good habit, this question is not very easy to answer, technology is never isolated, any kind of technological invention, is related. Bai Jing can ask this question, which means that he has not studied systematically, and the question itself is wrong, or not rigorous enough.

Considering the average level of the Great Chu people, plus ten times the parameters, it would be ten times better to be a secret master than an ordinary person in terms of knowledge structure. With this standard, it will feel much easier to communicate with the secret master.

"As long as the wire lasts, the signal can travel as far as it goes. Renault replied that it could not be said that it was wrong to answer without preconditions.

Bai Jing seems to have this habit, and when he heard Renault's answer, he thought for a moment and continued to ask: "Wire, do you have to use copper wire?"

Awesome, that's taking into account the cost?

Lao Tie, you think too much, the key is not in the cost, you still think about it, how can you get a stable power supply, there is no stable power supply, you can't play, rely on the voltage and current of the hand-cranked generator, how far can the signal be transmitted?

As for this question, it is easy to answer, of course, copper, if you have the ability to build an electrolytic aluminum machining center, it is also very good to use aluminum. Iron is counted, the resistivity is too high, and a larger voltage and current are required.

Try it with iron wire, windy, rainy, sunny, and a few months will be over.

"Yes, copper wire is necessary at the moment. Renault affirmed.

The flame still rarely spoke, he preferred to use his hands, cut a piece of copper wire of about one meter, pulled the small scale, weighed it, picked up the pen and counted it on the paper.

Soon, the flame weighed out, and the copper wire pressed out by Renault was about one square millimeter, one meter long, and weighed ten grams without enamel.

One mile, it will weigh one catty, this consumption, the flame feels that it is okay, although it is a double line, it is necessary to double the consumption of copper, which is nothing, Da Chu is not short of copper.

Showing Bai Jing the weight recorded on the paper and the calculated figures, the two secret masters nodded at the same time, their faces showing joy.

If you want to lay out Da Chu, it is still a little difficult, just connect the state capitals, and this thing can be done. After all, there are only seventy-two prefectures in Dachu, plus nine border cities and eighty-one routes, although the distance is far away, it is acceptable.

Of course, at present, we can only think about it, there are too many things to consider, hang the copper wire outside like this, can you expect the people of Dachu not to cut it into copperware?

Copper coins are also the legal tender of Dachu, although the face value is the smallest, but ordinary people, the most used is copper coins, with a silver coin, which is equivalent to carrying a thousand copper coins, not to mention that it is not easy to spend when buying things, and I am afraid that others will rob it.

Bai Jing glanced at the top of his head and shook his head, the copper wire couldn't go up there, it was supported with a wooden pole, and there wasn't much left that night.

Flame glanced at the ground, didn't shake his head, didn't nod, he didn't know if it could still be used if it was buried in the ground.

"Don't worry, you two, there is still a problem that must be solved......"

"Wait a minute, I'm going to go out and I'll talk about it when I come back. Renault suddenly received an alarm from the God of Wealth, and he couldn't care about the two secret masters, so he pushed open the door and ran out.

"Huya, prepare the horse, go out of the city. ”

The war horse has just been brought in, and the purple shadow has also run over, there is so much chaos in the house these days, there are too many people, it often makes up for people to drive away, annoyed to death, it is easy to see Renault, where can it let the war horse it looks down on take over, and kick the war horse away with a hoof.

Don't look at Ziying, she is still in her infancy, the varieties are good, and after eating red ginseng for a few months, she is no longer shorter than ordinary war horses.

"Don't make a fuss, I'm going out of town. Renault pushed Purple Shadow's head away and ran over to lead the horse.

With a hoof, he kicked the horse away again. Renaud was furious at the time, what kind of trouble are you making with a bear child, you didn't see me in a hurry here.

Since you won't let me ride a horse, I'll ride you. Renault pressed the back of the purple shadow, turned over and rode up, he didn't learn anything else, the improvement of equestrianism was too obvious, he felt that if he returned to the earth, there was nothing wrong with letting him perform equestrian performances.

Being ridden on his back, Ziying felt uncomfortable, this is also Renault, if it were someone else, he would have taken it off for you a long time ago.

"Purple Shadow, let's go, let's get out of the city. Patting his neck, the purple shadow jumped twice, and ran to the outside of the Shengong Palace, the palace of the palace family is not small, but for it, it can't run away at all, and after living here for a few days, it has long been tired of playing, and it is annoying, seeing that Renault let it run out, it was excited.

Huya didn't look good, jumped off the war horse, and quickly ran to the yard where the dragon foal was, and did not prepare a saddle, directly jumped on a dragon foal and chased it out, Li Si and Chu Rui did the same, and also gave up the war horse, don't look at these war horses are good horses for adults, but they want to compare the speed with the juvenile dragon foal, there is still a significant gap.

When he arrived at the fire kiln outside the city, Renaud jumped down and patted Ziying's neck: "Go play by yourself, don't run far, someone is looking for trouble, come back to look for me." ”

There is a big difference between a dragon horse and a war horse, not only in terms of speed and endurance, but also in terms of intelligence. It's only been a few months, and Renault can already understand most of it.

Cui Qing had a very troublesome time during this time, Mr. was studying a very magical thing, called a telephone, and he could learn interesting numbers, but Mr. didn't let him learn in the Shengong Temple, and when he got up in the morning, the first thing he did was to let Huya drive him out of the temple and go to the fire kiln outside the city to burn the flush toilet.

It's been more than half a month, and dozens of kilns have been burned back and forth, but the things that Mr. asked for have not been burned. In addition to burning the flush toilet, he also burns other things along the way, such as plates, bowls, vases, etc.

Mr. said that the flush toilet is a kind of porcelain, and it is very good porcelain, since it can burn such a large piece of porcelain, the small piece is naturally no problem. Therefore, in every kiln, Cui Qing will add a lot of private goods.

Renault naturally knew about this, and he had already let his wealth stare at it, and he did not object to Cui Qing's private use, anyway, the quality of Da Chu's porcelain was really bad. If you do it, you will do it, and you will always be able to use it.

Renault is a standard pragmatist, if you don't use it, you don't think about it, no matter how good it is, you have to find a way to get it out of it, no matter how difficult it is.

So he didn't pay much attention to steelmaking, at least not for the time being. Toilet paper, toilets, porcelain, these are daily necessities, you need to get them out as soon as possible, and wait for them to be used at home.

"Mr. Cui Qing, the kiln has been opened, do you want to take a look?" The one who spoke was the head of the kiln, named Li Chun, who was not only the head of the kiln, but also a master craftsman.

This kiln, originally an official kiln, is only responsible for burning porcelain, as long as the household can still get the money, the kiln fire will not be broken, a year, can also burn ten kilns and eight kilns of porcelain.

The problem is that the yield is too low, dozens or even hundreds of kilns can produce a kiln of porcelain, so when the kiln is fired, there will not be too many porcelain tires inside, usually a hundred pieces are capped.

There is no way, there are too many failures, I dare not put too many porcelain tires in one kiln, I can't afford to waste it. As a result, the amount of porcelain obtained is still very small when it is occasionally fired with good luck, and it is for this reason that the porcelain of Dachu has not been popularized, and it is still mainly pottery.

In fact, if it fails, it will not be completely wasted, and the fired porcelain is not porcelain, and the pottery can be sold for a few bucks.

Of course, there are many porcelain kilns like this, such as the official kiln of the Ministry of Industry, the royal imperial kiln, and the folk kiln, and there are hundreds of kilns for firing porcelain.

The imperial kiln is only for the royal family, the official kiln is for the court officials, only the private kiln will flow into the market, for the use of the wealthy in Dachu, and more are on the road of gold, sold outside the Great Chu, in exchange for the same weight of gold.

There's a reason why porcelain is so valuable. Refined iron can't be used as cutlery, it will rust. Gold and silver tableware are also available, but the value is also very high, and if you use it for a long time, you need to deal with it, otherwise it will be ugly. After a long time, the gold plate will be dull in color, and the silver plate will become dirty after a long time, and it will look dirty and old.

In some places, lead plates were used, and it turned out that the nobles who used lead plates died relatively early. It's not bad to use a tin plate, but the same problem is that it's ugly.

This is all because the smelting technology is not up to standard, and the melting point of lead and tin is relatively low, which is easy to melt and cast. Gold and silver can only be made by heating, and these two precious metals are very extensible.

There are still many metals in the Great Chu world, but with high melting points, it is too difficult to make. Ordinary nobles mostly use copper and tin to make tableware, and those who are richer will use gold and silver.

As for the people, most of the tableware is wooden, which is cheap and easy to make, and it is not distressing if it is broken. A little better, with pottery, the process of burning pottery in Da Chu is still good.

When porcelain appears, these tableware all have to stand aside, porcelain not only looks smooth and clean, but also can burn patterns on it, the beauty of a step is confused, plus the scarcity is expensive, not to mention the big Chu, in the big Chu country, the value of porcelain is also quite amazing.

"Of course it sees, let's go. "Every kiln, Cui Qing will personally look at it, so far, a small half of the things burned out are bad, half are pottery, the last few furnaces are a little better, at least a little bit of porcelain can be seen.

Cui Qing is in a hurry to burn out the porcelain toilet, and wants to go back to follow his husband, learn more and see more, the artifact that can be called, it is itchy to think about it, in recent days, he can't concentrate, and he often wanders.

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