"This year's weather is indeed colder than in previous years."

"These charcoals are a bit unburnt!"

Within Xuchang Yamen.

Cao Cao stretched out his hand to light the charcoal fire, looked at the heavy snow outside the hall, and couldn't help but say something.

Xun Yu on the side seemed to think of something when he heard this.

"Lord, as Fengyi said before, stone nirvana can be burned for heating purposes, but this thing seems to be very widespread in the area where Hebei merged with the two states."

"Shi Nie? Jizhou!"

Cao Cao was stunned when he heard the sound, and then raised his brows.

"That's what Feng Yi said, and it's absolutely correct!"

"I will write a letter to Yuan Benchu ​​immediately!"

It snowed heavily in Xuchang and the weather became increasingly cold. After Xiyu said that Shi Nie could be burned for warmth, Cao Cao immediately wrote to Yuan Shao, intending to exchange Shi Nie.

In response, Cao Cao offered paper, grain and other items in exchange, and Yuan Shao happily agreed.

A few days later, a large amount of black stone was transported from Jizhou to Xuchang.

After learning that Cao Cao had obtained a large amount of coal from Yuan Shao, Xi Yu rushed to Jiang's workshop as soon as possible.

Although the coal that is directly mined can be burned directly.

But if this thing is burned directly, it is still somewhat wasteful in today's era.

In the next few days, Xi Yu remained in prison.

"I heard that Fengyi has been in prison recently?

Hasn't he already taught those who will become great craftsmen how to make this stone?"

Inside the Xuchang Yamen Office, seeing that Xi Yu was not present, Cao Cao took the initiative to ask Xun Yu who was standing next to him.

The stone nirvana obtained from Jizhou is indeed good. After being processed as Xi Yu said, the temperature is much higher than that of charcoal.

Nowadays, the entire Xuchang market, and even the Han Palace, have basically begun to use stone nirvana instead of charcoal for burning.

That guy Yuan Benchu ​​occupies a good place!

"I do know what Fengyi is doing!"

Hearing Cao Cao's question, Xun Yu subconsciously smiled and responded.

Xi Yu had a lot of research on the work of ink workers. This was already very clear to Xun Yu from the original Quyuan plow and waterwheel incident.

"Oh, tell me!"

Cao Cao was a little curious.

In his opinion, Xi Yu had just gotten married, so it was normal not to come to the government office to attend. After all, he still had two wives at home!

However, since he did not come to attend, nor was he at home, but stayed in the general prison, Cao Cao was a little confused.

Hasn’t Shi Nie’s matter been resolved?

Why are you still serving as a prisoner?

"I heard from Fengyi that he wanted to do some floor heating in the house, once and for all, so that he doesn't have to have a fire in the future!"

Hmm?

Floor heating?

Fengyi is studying this. How is it possible that in such a cold winter, the home can be heated without a fire?

"Wen Ruo, there's nothing important this time. Why don't we go to the prison to see what Fengyi is doing?"

Cao Cao was a little curious.

He is naturally very clear about Xi Yu's abilities.

If he were asked to think about things like the plow and the waterwheel, he wouldn't be able to figure it out. Naturally, he couldn't figure out what kind of floor heating he was talking about right now.

However, since I can’t figure it out, luckily I might as well just go and take a look.

If you really don't need to light a fire, you must get one for your house.

In the cold winter of the twelfth lunar month, I only relied on the fire to keep warm, but it was still a bit cold after all.

Even though charcoal has now been replaced by charcoal, the fire cannot be placed next to the bed!

After hearing what Cao Cao wanted, Xun Yu did not refuse.

Now that the New Year is approaching, there is not much going on in Xuchang.

I was originally worried about the high price of charcoal in the cold winter, but now it’s almost solved because of the stone nirvana.

The refined Shi Nie has now been sold in various places in Yanzhou starting from Xuchang.

Even ordinary people can hoard some stone nirvana at home.

The two of them left the government office together and walked towards the general supervisor in Xuchang.

Not long after.

After arriving at the prison, I discovered that Xi Yu was not here this time.

After asking the guards on duty, Cao Cao and the two found out that Xi Yu had led a group of generals and supervisors to his home early the day before yesterday.

Inside the theater at this time.

The entire ground in the theater hall has been excavated, and strange-shaped iron pipes were buried in the ground following Xi Yu's command.

Xi Zhi next to him was a little stunned.

"Ayu, can this thing really warm up the whole room?"

Since the arrival of the cold winter, Xi Zhicai has discovered that his younger brother has spent a lot of time at home researching weird things.

Now, the entire general and supervisor are about to move home.

"Sir, you really have a wonderful idea!"

After Ma San, who had been promoted to the position of chief eunuch, buried the pipeline, he couldn't help but open his mouth and praise it.

This statement was highly recognized by the generals and supervisors nearby.

These craftsmen themselves regard the Mohist family as their ancestors, although Xi Yu has never admitted it.

But these craftsmen have long regarded Xi Yu as a direct descendant of the Moh family.

"Ma San, have you done the flush toilet I asked you to help me with before?"

Taking advantage of the time to install floor heating, Xi Yu casually asked Ma San beside him.

"Sir, it's ready. We've also made the tap water you mentioned. Do you want to help you install it in your house?"

Ma San responded, and Xi Yu nodded in agreement, and all the master generals and supervisors hurriedly started working again.

Things like running water and flush toilets have long been handy to the supervisor under Xi Yu's guidance.

It didn’t take long for the entire theater to look brand new.

When Cao Cao and Xun Yu arrived at the theater, the master craftsmen who were in charge had already left.

At this moment, in the main hall of the opera house, a square table of medium or small size was placed in front of Xi Yu.

The main door of the main hall is open, as if a gentle breeze is blowing.

Xi Zhicai was wearing a thin shirt, and he seemed to be a little warm, even the robe on his chest was opened a little.

Opposite Xi Yu is also wearing a white shirt.

The two brothers sat opposite each other, with Zhao Yun and Dian Wei sitting cross-legged on the left and right sides respectively.

Zhao Yun is also wearing a thin shirt, while Dian Wei opposite him has his arms open.

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On the square table, the sound of mahjong clashing can be heard endlessly.

After Cao Cao and Cao Cao entered the theater through the main gate, they passed through the corridor and looked up to see the main door of the theater open.

Upon entering the eye, Dian Wei's generous muscles are instantly visible.

"Wen Ruo, am I right?"

Cao Cao was a little stunned. He was only a few steps away. Not far away, Xi Yu and others were dressed as if they were in midsummer.

At this moment, he was covered in fur clothes and a big cloak, and his whole body wanted to be wrapped tightly.

The wind blowing from Changting was still a bit cold, and it made Cao Cao feel numb.

Xun Yu was also a little stunned.

He understood the situation in front of him in just a moment.

I never thought that what Fengyi said about floor heating was actually true.
To be continued...