Minutes and seconds passed.

Ren Yan naturally didn't think of what kind of storm his words would bring.

Wait thirty minutes.

Ren Yan slowly opened his eyes and started the next work.

He walked over to the earthen fumigation unit and opened the side door.

In an instant, a large amount of steam poured out.

After the steam completely dissipated, Ren Yansan came to the wood in two steps and touched it slightly with his fingers.

The touch of the wood is now very different from before, it is no longer as hard as before, but a little softer.

Seeing this, Ren Yan nodded.

Take out the wood directly, and extinguish the charcoal that is about to burn clean.

Then the wood was placed on top of the aluminum basin prepared earlier, and some bricks were padded in the corners.

Underneath the aluminium basin, some lit charcoal was still placed.

After doing this, Ren Yan looked at the students of Class 9:

"The wood is fumigated to such an extent that you can clearly feel the softness inside it, and the color is slightly darker."

"After that, the wood needs to be molded by heating."

"Fumigated wood alone is not enough to complete the molding, and the temperature must be maintained to a certain point."

"Each wood has a different moldable point, which you can find or experiment with later."

"And in the process of shaping, you must be patient, you must finish it step by step, and don't push too hard, otherwise, all you can get is a piece of wood with a lot of cracks inside."

"This kind of wood, if you are not careful, will fall apart and be light."

As he spoke, Ren Yan slightly bent the piece of wood in front of him with his hands.

The expression is extraordinarily serious, and the speed of bending is extraordinarily slow.

If it weren't for the long time of staring, you wouldn't even be able to see the traces of Ren Yan's hands moving with the wood.

But it is in this slowness that the wood gradually deforms.

After about twenty minutes, an arc that was so exaggerated that it could not have appeared on the wood was completed.

Ren Yan took a look at the wood like a crescent moon and nodded with satisfaction:

"This is the curved wood you want, and with the blessing of this curve, there should be no problem in making a suitable keel."

"As for the rest, it is natural air drying, and the use of mortise and tenon structure."

"I've talked about all of this before, and you've actually done it, so I won't say more."

"You just need to know that the wood has to be air-dried until the color is restored to eighty or ninety, and it feels perfectly woody."

"Otherwise, it won't fit perfectly with other woods."

With that, Ren Yan threw the wood in his hand to the students of Class 9 and walked towards the chair again.

This time, the wood selected by Ren Yan is not large, and if the volume is huge, then the time used will still have to be doubled.

After taking the wood thrown by Ren Yan, all the people in the ninth class carefully observed it, and kept recalling Ren Yan's actions just now.

It didn't take long for them to feel like they had mastered the technique.

Started to prepare for the production of some new fumigation units to come out.

With the existence of this technology, are they still afraid that they will not be able to figure out the keel themselves?

So, they were quick to act.

Only Wang Yu felt that things might not be so simple.

Before the action, he also pulled his classmates and asked them to tell him how to play the mortise and tenon joint.

He felt that only in this way could he think more perfectly.

However, the answer was:

"I can't tell you anything now, you have to practice this thing."

"Do you understand practice? It's the kind of thing you love the most! ”

In this regard, Wang Yu was speechless, so he could only follow the students of Class 9 in dismay.

But the uneasiness in his heart grew stronger.

Is it really that simple to build a giant keel?

......

Over time.

As night approached, Class 9 managed to get all the fumigation devices.

In the fenced area around the warehouse, one after another earthen fumigation equipment has been erected.

And in the process of manufacturing, they found out how pitiful this method is.

The fumigation wood used by his teacher at that time was only a short twenty or thirty centimeters, and the equipment used was naturally not good.

You can build it with just your hands, just like building blocks.

But once the volume of this 'building block' has been flown over, the difficulty is not at all a level.

Any problem that is negligible will be infinitely magnified.

The assembly of a single shell alone took up a lot of their time.

They were forced to review the mortise and tenon structure, although it was still the simplest way to connect.

But after such an afternoon of edification, they feel that the previous feelings have returned, and even surpassed.

It was also in this process that Wang Yu understood the practical application of mortise and tenon joints.

And in the afternoon, they all took some small carpenter's tools and mortise and tenon joints, but they were never able to make a perfect fit of the mortise and tenon joints.

The spliced silhouette is always wobbly, and the analysis between them also looms with this shaking, but it just doesn't collapse.

It's really the same as a certain figure with poor workmanship.

It makes him unusually tired.

Whether you say it or not, Mr. Ren's analogy is always so appropriate.

In addition to the splicing of the shell, the bigger problem comes from the humidification and flame prevention fire.

Because the wood that needs to be fumigated is conservatively estimated to start at three meters, their fumigation equipment is extraordinarily large.

Soaking it all with water becomes a tedious task.

In addition, a large amount of charcoal is required for fumigation, so the heat energy generated is also more and more abundant.

Ordinary soaking may not be effective at all, and it will have to be steamed by charcoal in minutes, which is much faster than the rate at which water vapor is generated.

They've experimented on this.

After thinking about it, they had to choose to saturate the wood before the shell was spliced, so that the best fire protection could be achieved.

Or make a bunch of fireproof bricks out again and use fireproof bricks to build the shell.

But this idea was extinguished by the students of Class 9 as soon as it was born.

Hundreds of fireproof bricks will be rebuilt, and I'm afraid they won't be able to start acting until next week...

And in addition to these, the most difficult point is the temperature control device.

It looks simple, and the principle is not complicated.

It is just the size of the steam in the cabin to move the small ball on it to rotate on its own, and then through the speed of rotation, it pulls the connected planks on its own to achieve a balanced effect.

But when they actually do it, they realize how hard it is to make this process happen.

It took them a long time to make a spinning ball alone.

In the end, after removing their own teacher's control device, they barely understood the structure and reproduced it.

In the meantime, they wanted to listen to their teacher's suggestion to connect this thing to the thermometer.

For this reason, they also bought a few large thermometers.

But after that, no matter how hard they rack their brains, they just can't achieve their goals.

Either the thermometer is broken and unusable.

Either that they are connected on the surface, but in fact the two have no half-dime relationship.

In the end, they could only choose their own teacher's method, and leave everything to nature.

It also gave them a full sense of the difference between the demonstration and the actual operation.

It's no wonder that a lot of things are good when they are demonstrated, and when it comes to actual operation, they are exaggerated.

The difficulty of these two is simply not on the same order of magnitude.

Even when they were busy until mid-afternoon, they sincerely envied their teachers.

When will they be so lazy and so calm?

But fortunately, the hard work was not in vain.

As the sun went down, they did it all.

And I couldn't wait to start my own fumigation work.

Although it's time to go back to the apartment now.

But under the efforts of everyone, Ren Yan could only meet their small request.

Looking at the already dark sky, he suddenly wanted to laugh in his heart.

These cubs in front of me don't know what they've missed...

Soon, the fumigation is complete.

The students of Class 9 were elated and looked forward to taking out one giant piece of wood after another.

However, when it comes to testing the quality of fumigation.

Their expectant faces suddenly became speechless.

This time they fumigated a total of ten pieces of wood.

But there are only three that are really fumigated in place.

The yield rate is simply scary.

This made them feel a little sad in their hearts.

I've worked so hard, why is this happening?

Later, after a period of brainstorming, they confirmed the workmanship of the fumigation equipment and the texture of the wood itself.

This is exactly what my teacher said.

They need to keep experimenting.

Class 9 can only put this question on the back of their minds for the time being.

Started to work on the plasticity of wood.

As Ren Yan did, they put up one aluminum basin after another and began to shape them in sections.

But this thing is also different from the lightness shown by my teacher.

It wasn't until the moment they started plasticizing wood that they knew how hard it was.

Don't try too hard to destroy the structure inside the wood?

They want to destroy!

But the texture of the wood didn't allow them to do that!

Even if you exert yourself harder, the speed of the wood bending is still undetectable, and you can only slowly shape it little by little.

And because there are too many segments, each person is responsible for a different area, and there will be a little difference.

After the overall plasticity is completed, the original wood has a bit of the shadow of the golden snake sword.

The perfect arc that I was expecting was not made at all.

This time, they were even more tired.

I am also deeply aware of...

There is probably no way to do the job of plasticity by yourself.

Eventually, after a long sigh, they chose to give up for the time being.

It's all about practicing today.

The production of the keel will begin in earnest tomorrow.

In this way, everyone was ready to end the day's work in a burst of grief, and was ready to call their cheap teacher back to the dormitory together.

But when they turned their heads to look at the chair, they didn't see Ren Yan's figure, only a note left on the chair.

Stupid little cubs! 】

[If you want to work overtime, you can add it yourself, teacher, I won't accompany you, go first. 】

[Just wait and go back by yourself.] 】

[Oh, that's right~]

[I also have to remind you that the last bus in Qinhuang City is 8 o'clock in the evening. 】

Don't miss it. 】

[Ren Yan. 】

Look at the note and look up at the sky.

A bad premonition instantly surged into the hearts of the students of Class 9.

Without saying a word, they took out their phones and looked at the time.

【20:30】

In an instant, they felt as if something had cracked inside.

This day is too sad!

Can we stop building this ship!

Immediately, they could only look at Ah Wei expectantly.

Taking a taxi back to the apartment was the last option.

Walking five kilometers on their legs, they really can't do it now!

It's a double torture of body and spirit!

In the end, Ah Wei could only nod slowly under everyone's gaze.

On this day, the students of Class 9 deeply realized what it means to work overtime and lose money...