The cement was successfully made by Gray.

At this moment, the excitement in his heart was beyond words.

Without saying a word, Gray started mixing the cement directly. After mixing the cement, he had it poured on a small piece of land in the industrial area for an experiment.

By the time Gray returned to the castle, it was already almost midnight.

After tinkering all night, he finally made a cement road in this world.

Just waiting to see the results tomorrow.

Gray happily took a shower and went straight to bed.

After sleeping until close to noon the next day, Gray took Tina to the industrial area again after lunch.

After inspecting the cement road, he was completely relieved and asked people not to walk on it. Then he started to let people burn cement according to yesterday's method.

Because Gray tried many times yesterday, those who were with him basically knew the process of burning cement, so after receiving the order, they started taking action without saying a word.

Their success rate and speed today are obviously much better than yesterday.

In one afternoon, a lot of cement had been burned.

According to Gray's idea, the coolies in the industrial area laid a layer of gravel between the industrial area and Thorn City, and then poured it with cement.

Gray specially asked people to lay cement in small sections of the road.

There are also some gaps between each section of road to prevent thermal expansion and contraction.

In the next few days, a new, flat cement road appeared between Thorn City and the industrial area.

Gray didn't go there every day, and after the first two days, he stopped going.

After all, someone somewhere already knows what to do.

The success of the cement road convinced Gray that real construction of the industrial area could begin.

In the past few days, he had summoned businessmen and many craftsmen so that they could start planning how to build their own factories. After Gray divided their land locations for them, he left directly.

His time is precious and will not be wasted on these people.

In addition, construction has already begun on his land, and the people doing the construction are refugees who have just finished working in Thorn City.

At this moment, they no longer look like refugees. They are all full of energy, with smiles on their faces, and they seem to be living a good life.

Now they have a brand new name in Thorn City, Yellow Hat Workers.

Because a few days ago, Gray distributed a yellow safety helmet made of strong iron wood to all of them.

Ironwood is a special material in this world. It is hard in texture but very light in weight.

This is great for making safety helmets, at least this kind of hat can really stop the pressure caused by falling objects.

Because these workers all wore safety helmets, the residents of Thorn City gradually called them Little Yellow Hat and Yellow Hat Workers.

Prior to this, the residents of Thorn City called these people Hammer Workers because of the hammer symbol on their bodies.

It can be said that these yellow hats obey Gray's words.

During this time, under Gray's guidance, they have learned to use cement, and also understand some of the main issues to pay attention to during construction.

After the workers thoroughly mastered the method of using cement, Gray ran away again.

Gray went to do another thing.

Because he discovered that the world’s understanding of building materials still rests on the stone itself.

At most, it's just using a little bit of wood, and then it's gone.

Gray doesn't want to waste time and manpower because of stone problems.

So he chose to get something new again.

This time he planned to bake bricks.

Compared with making cement, making bricks is much easier.

Gray purchased a large amount of clay and then had the remaining Yellow Hats make adobes every day.

When the bricks are almost dry in the shade, the special brick kiln is almost ready. It's still the same old way of putting the bricks in and firing them.

But unlike cement, bricks take a little longer to bake.

So it takes a day or two to make a batch.

Fortunately, Gray had anticipated this, so he built more and bigger brick kilns.

One batch can burn tens of thousands of bricks.

When the green bricks are fired, official construction can begin in the industrial zone.

With cement and bricks, workers could build at breakneck speed.

Green bricks are small and neat, and do not need to be cut or polished like stone.

Moreover, green bricks are easy to transport and are not as bulky as stone. It takes several or even a dozen people to move a stone.

This can greatly save time and labor costs.

So while other businessmen were still laying stone slabs, the houses on Gray's side were already beginning to take shape.

It's the same industrial area, so it's easy for everyone to see each other's situation.

So other businessmen quickly discovered something was wrong with Gray.

Then they saw the flat and hard ground on Gray's side, as if it was a single piece of flat ground.

At the same time, they also saw the almost identical green bricks. This material is hard and easy to use.

Building a house is also fast. You only need to apply that kind of cement and stack the green bricks together, and the walls and pillars of the house can be completed in no time.

Moreover, the walls and pillars made are smooth, elegant and beautiful.

It's not comparable to the stones they used.

After seeing Gray's progress, everyone else's eyes popped out.

The three Harrys and their businessman friends immediately found Gray, who was spending his leisurely time in the castle.

And he proposed to use the same materials as Gray.

Gray nodded without saying anything.

And asked Tina to take out the material price list that she had prepared long ago.

The merchants immediately exclaimed after seeing the prices of cement and bricks marked above.

Not because it's too expensive, but because it's too cheap.

Each ton of cement only costs 3 silver coins.

Each blue brick only costs two copper coins.

In this world, one gold coin is equal to one hundred silver coins and ten thousand copper coins.

In other words, one gold coin is enough to buy 5,000 bricks or more than 30 tons of cement.

The savings were huge compared to their previously planned budget.

The businessmen made another calculation and found that the money spent on building factories with stone materials could not only build three factories of the same size in Gray.

Moreover, the materials here at Gray are convenient and durable, which can greatly speed up the practice.

It feels like it only takes a month to set up the factory!

Originally, their plan took more than half a year.

For businessmen, time is money.

Gray saves them time, which means it makes them money.

Without hesitation, the merchants directly purchased goods worth thousands of gold coins.

Don't underestimate a few thousand gold coins.

That's a gold coin.

Ordinary small businessmen may have to travel longer to make so much money.

Moreover, building materials such as cement and green bricks are commodities in great demand.

The materials ordered by these merchants in the industrial area alone have reached the level of thousands of gold coins.

There will definitely be people who don't have enough and will continue to order. In addition to them, there will also be a large number of businessmen who will order cement and green bricks in the next few days.

Gray estimated that after excluding the costs, he would have no problem earning one or two hundred thousand gold coins from the industrial zone project.

It's a pity. The reaction of those merchants just now clearly felt that he was selling cheaply.

Gray already felt that he had opened his mouth.

But he still quoted a low price.

Heartbroken, rounding off, I lost 100 million!

Next time you quote, the price must be doubled!

What?

How much does it cost, you ask?

The cost of a blue brick is only between one-third and one-half copper coins?

The cost of one ton of cement is only about 80 copper coins, mainly because iron ore and coal cost more.

Gray didn't make much, just hard-earned money, not worth mentioning.

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