Chu Ze disliked him again.

"It's just the model. We still have to think about how to do it. If it weren't for the fact that he didn't have pen and paper at hand, he would have drawn at this time.

Zhu Fan let out a long "oh" and asked again: "Then what are you going to do?" ”

Chu Ze glanced at the model in his hand.

He spun very fast.

Although the handiwork is not good, the general appearance is not bad.

He glanced at the circle that already had the shape of a wheel, and said to Zhu Rong: "Make a bicycle." ”

"What's the car?" Zhu Fan plucked his ears.

He had heard of horse-drawn carts, donkey carts, and mule carts, but he had never heard of bicycles.

He suspected he had misheard.

Or maybe Chu Ze said it wrong.

Chu Ze repeated again: "Bicycle." ”

Oh, he heard it right, and Chu Ze didn't say it either.

People are talking about bicycles.

But what kind of bicycle is it?

"This car...... Is it for eating? Or is it something unique to your time? "It's so small, I guess it can only be placed somewhere, so that people can watch it.

It's like a vase in their house.

Chu Ze's subordinates kept moving, and continued: "Bicycles can't be eaten, they are a means of transportation. ”

Speaking of this, Chu Ze stopped his movements and thought about it carefully.

Then he looked at Zhu Fan seriously: "If you want to say it's a thing, it's right." ”

After there are more means of transportation in the back, the use of bicycles is more reflected in other aspects.

Take fitness, for example.

"But now, it's good to make transportation." Bicycles don't pick up roads, you can walk on the cedar road, you can walk on the cement road, you can walk on the stone road, you can walk on the gravel road, and even as long as the country terrier that can accommodate the wheels can also walk, as long as Lan Ruoyan wants, she can ride her own bike and go wherever she wants.

Chu Ze thought about it and felt that this was quite good.

But what to do stumped Chu Ze.

It wasn't the frame that stumped him, it was the tires.

In his memory, the earliest bicycles were without tires.

There are only two large round wheels made of wood.

Riding it, it doesn't feel very good.

Later, rubber tires gradually appeared.

And the problem arises on this rubber tire.

There are two types of rubber.

One is natural rubber, which is extracted from plants such as rubber trees and rubber grass. The second is synthetic rubber, which is a polymer made of petroleum and natural gas as raw materials and diolefins and olefins as monomers.

Plants such as rubber trees still lived in South America at this time.

It will not enter China until the beginning of the 20th century.

As for synthetic rubber, they now only have oil.

And he couldn't figure out the aggregation system.

What to do?

Chu Ze was worried.

But before he could worry, he had to make the bike first.

Lan Ruoyan played for a day, and when she returned to her residence, she was still alive.

It's like a lot of clockwork.

Chu Ze pressed the worries in his heart and played with Lan Ruoyan for two days, so he casually found an excuse, entrusted Lan Ruoyan to Zhu Fan to take care of him, and plunged into the factory by himself and began to make bicycles.

Wheels and axles and other things, Chu Ze used the simplest preparation.

The frame was made of iron, and the chain was made, and the most primitive gear used to drive the rear wheel to turn.

It's just easy to make a skeleton.

According to Chu Ze's meaning, it didn't take the workers a few days to make the frame.

Chu Ze assembled them one by one.

The assembly was complete, and he got stuck on the tire again.

At this time, Chu Ze was sitting behind a small table, staring fixedly at the bicycle rack opposite.

Don't think about rubber.

He couldn't figure it out.

At least not yet.

He had to find another way.

Thinking about it, he suddenly thought of a legend about the origin of bicycle tires.

It is said that at that time in England, there was a bicycle race.

At that time, the bike didn't have tires yet.

A contestant, if he wants to win the competition, racks his brains to find a way.

Thinking about it, he stared at the plastic pipe used for watering in the backyard.

As soon as he had an idea, he cut out two sections according to the size of the wheel, inflated it, sealed it with glue, and then tied it to the wheel.

The bike with a plastic hose strapped to it was much lighter than the others, and it won him.

Then bicycle tires began to take off.

Like the former, plastic is a material that he simply can't get out of now.

Chu Ze sighed faintly.

Could it be that his bicycle can only run "barefoot"?

Chu Ze's brows furrowed, his face full of resistance.

But Daming has no rubber trees at all.

It can't be synthesized.

Plastics are also not synthetic.

Thinking of this, Chu Ze sat up straight.

He muttered in a low voice: "Yes, we really can't do synthetic plastics now, but aren't there still natural plastics?" ”

To be precise, it should be called natural resin.

As far as Chu Ze knows, there are two ways to obtain plastic.

One is an object that is made of a monomer as a raw material and then combined through a series of chemical reactions.

On the other hand, resin is used as raw material and made by a series of processes such as casting or extrusion at a certain temperature and pressure.

Resins, on the other hand, are also divided into synthetic resins and natural resins.

Now the conditions are limited, he can't synthesize, but he can use natural resin.

He remembers that among the natural resins, rosin is more common.

And it is insoluble in water.

Wouldn't it be nice to make a tire?

Just do it, Chu Ze immediately got up and collected rosin all over Quanzhou.

It didn't take a few days for Chu Ze to find a sufficient amount of rosin.

After getting rosin, he began to look for a way to make rosin into tires.

If you want to make a natural tree finger into plastic, you have to use temperature.

Since that day, Chu Ze has been soaking in the stove room, constantly groping for ways to make tires.

In addition to the necessary rest, he even ate and slept in it.

After staying up like this, time quietly slipped to Lan Ruoyan's birthday.

Lan Ruoyan is a little listless these days.

She hadn't seen Chu Ze in days.

She asked Zhu Zhang, and Zhu Fan didn't tell her where Chu Ze went, but only said that there was something wrong and asked her to wait patiently.

When asked again, he only smiled and did not answer.

Seeing that she couldn't ask anything, Lan Ruoyan simply stopped asking.

Until today.

Zhu Fan saw his expression and said with concern: "Why don't you eat, is the food unappetizing?" Why don't we have someone re-prepare? Zhu Fan was just about to call someone, but Lan Ruoyan stopped him: "Forget it, these are good." ”

It's good to say it's good, but don't use chopsticks.

Zhu Fan thought about it and smiled secretly.

"In this way, you eat first, and after eating, let's take you to a very interesting place, how about it?"

Lan Ruoyan is still lacking in interest.

She didn't want to go anywhere now, she just wanted to see Chu Ze.

Then, she heard Zhu Fan say, "Maybe you can meet the person you want to meet there." ”

The person she wants to see is not Brother Chu Ze?!

Lan Ruoyan's eyes lit up, and she said in surprise: "Really? ”

"Really, hurry up and eat, we'll go over when we're done." Zhu Fan moved the dishes in front of her and urged. (End of chapter)