There is no trace of blood on the floor tiles on the ground, after all, after hundreds of years of wind and frost, there are traces of people kneeling on the ground next to them, which is enough to show how they worship the ancestors who used their lives to make Zhaojiagou prosperous. Pen ~ fun ~ pavilion www.biquge.info

Looking at the traces on the ground quietly, it seems that you can see the concentration of Zhaojiagou people on firing city bricks for hundreds of years.

Back then, I believe that it was the entire Zhaojiagou family that devoted themselves to firing and continued to innovate that led to the current huge kiln factory.

Zhao Mubai went to get the secret record, and after calming down, Village Chief Zhao explained the firing process of the entire kiln factory to Si Fan.

This thing doesn't need to be kept secret, because everyone has known it for a long time! Nowadays, there are too many modern technologies that can solve problems that could not be solved at the beginning, and burn better wall tiles.

But that quaintness is gone.

Village Chief Zhao walked through the kiln factory with Si Fan on his waist, pointing to the equipment in front of him.

"During the Hongwu period, it was the era of the most stringent requirements for the burning of city bricks in all dynasties, and in order to build the city wall, Zhu Yuanzhang, the Taizu of the Ming Dynasty, was strict when he asked, and it was really knocked on the sound, and there was no hole in it. Village Chief Zhao mentioned that request again.

There is a sound of knocking, and there is no hole in the break!

This is a very high requirement for city bricks.

It is also a requirement for sturdiness.

With this request, Si Fan visited the firing process of the city bricks.

This is completely different from what Si Fan had in mind.

It takes a full seven or eight processes to make bricks alone, although it is slightly easier to make porcelain than to fire.

However, just these seven or eight processes, when the number is put on top of the wall tiles, it is already jaw-dropping.

You must know that the number of bricks used to build the city of Nanjing was hundreds of millions of square meters! This is a huge investment that only the state can bear.

However, Huaxia spent so much effort and financial resources to build the city wall.

A large number of wall tiles on the ground are from the Hongwu decade. It was the time when the walls were built.

The wall tiles that are needed are also the most numerous.

After Village Chief Zhao took Si Fan around in a circle, he finally came to the firing site.

"This is where our kiln is fired. Different from the scattered and funny city brick kiln, there is only one kiln in our Zhaojiazhuang! But it is also the largest kiln, and the production is also the most sophisticated. During the Qing Dynasty, the wall bricks burned by our Zhaojiagou people used to be the first choice of the high-ranking families in the capital, and our original white bricks were all scrambled by some high-gate compounds.

Si Fan also nodded. In fact, there are such magical wall tiles in the palace he saw, and the other wall tiles have always become very fragile and damaged in the hundreds of years of history.

Only one kind of white porcelain city brick has experienced a hundred years of wind and rain without half a point of change!

Si Fan had heard of this famous wall tile before, and now he could finally see it.

"That's the process before firing!" he said, pointing to a pond in front of him.

Si Fan looked at the pond. From top to bottom, it was cloudy, and the bottom of the pond was barely visible, and no living thing could be seen inside.

"If you want to make city bricks, you must first use a sieve to remove impurities, and our children in Zhaojia Village have to learn to burn wall tiles from this step from an early age. Village Chief Zhao explained.

Si Fan saw that the ground was very clean, and there was almost nothing left of it.

Nearby, however, there is a hill.

It is estimated that it is the impurity that has been screened out.

Over time, it has changed from a mound of dirt to a hill now.

Looking at this hill that is a full seven or eight meters high, you can know how many wall tiles have been burned over the years.

"Only the clay that has been screened three times can be burned, and the material is the basis of the city bricks!" After the introduction, Village Chief Zhao guided Si Fan to the edge of the pond next to him.

Next to it was the cowshed, and there were seven or eight fat and strong buffaloes in the cowshed, humming and looking at Si Fan, a stranger.

"This is the pond of our kiln factory. The selected clay is soaked in the pond, where the buffalo trample and mature, and after a few times, only the most delicate part of the soil is added to the billet to make the billet...... Wait for it to dry before it can be fired in the kiln. Village Chief Zhao introduced these series of crafts.

But these are the most basic, and the most important things are not revealed in a word. This is how every old brick kiln did this.

Now tell Si Fan that there is no problem, and his technical secrets are all skills that seem to be small or even imperceptible.

It could be a puddle of boy urine that a child occasionally sprinkled in the kiln, or it could be a handful of powder thrown into the brick kiln.

It's all about hundreds of years of experience. All success is probably in these small means.

These skills are taught by the master when the master is old and is about to pass away, pulling the apprentice or son to gently teach in the ear.

It is also the capital of their survival.

Si Fan didn't want to know so much, he didn't want to burn bricks! He also respected other people's secret recipes.

I just smiled and watched the process behind.

The whole kiln mouth is very huge, and from a distance it looks like a steamed bun. That's why it's called a steamed bread kiln. On top of the mouth of the kiln there are three large chimneys.

After the explanation, Si Fan also had a general understanding of this.

Of course...... It's just an approximation. The specific details are still the specific operation of other professionals.

The things that laymen instruct insiders will never do.

Looking at the entrance of the kiln carefully, after walking around for about a while, he saw a gray-white figure running in the distance, Si Fan could be sure that this was Zhao Mubai, because he roared loudly as he ran. In his hand there is a thread-bound book.

"I found it! I really found it. The notes of the ancestor Zhao Deshan let me find it!" Zhao Mubai ran over excitedly. took Si Fan's hand and didn't let go.

He's white and gray, with a musty smell that makes people go crazy when they smell it.

Si Fan tried to distance himself as much as he could.

"What the hell did you find? Something, you say!" said Si Fan.

Zhao Mubai, who was on the other side, looked at the clothes on his body, and suddenly said embarrassedly: "I'm sorry, I was excited just now! I found the recipe for the ancestors to carefully fire the white porcelain city bricks. At that time, this kind of castle brick was very strong and the top brick, but even so, the amount of firing was too small, and the rate of inferior products was too high, so it was abandoned. ”

"Now, I finally found the notes of the year, found the biggest regret of the year, and the biggest dilemma of the year!"

"It's just that the temperature is not enough!"