In the quiet night, a faint fire flickered quietly in the carpenter's room of the Qingque tribe.

In the dim light of the fire, a figure was busy working cautiously. He didn't dare to make any big movements or noises, and even walked very carefully.

It was as if he was worried that if he moved too much, it would disturb the quiet night.

In the quiet night, time passed quietly, and this figure was busy here.

The fire was not extinguished until the chickens raised in the tribe crowed several times.

Then a man quietly came out from the courtyard of the carpenter's room, and then groped his way through the courtyard, heading towards where he slept.

He walked very slowly during this process.

On the one hand, he was worried that if he walked too fast, his footsteps would make noises and wake up the people living in the courtyard. Another reason was that there were many mats laid out in the courtyard and many people were sleeping there. The visibility was poor at the moment and he was worried that he would step on someone.

The two people, one heavy and one light, swayed back and forth as they walked, deliberately slowing down their steps, groping in the night.

After a while, he had to admit an extremely helpless fact.

The thing is, he couldn't find where he slept before...

After hesitating for a while, he finally gave up resistance and groped his way to the wall. He then found a deserted place, sat down with his back against the wall, stretched out his legs, folded his arms in front of him, and soon fell asleep...

When it was just getting light, some people in the tribe had already started to get up, preparing to continue working hard for the ongoing harvest.

Lame, who was sleeping against the wall, was awakened by the noises.

He rubbed his head and stood up from here.

At this time, with the relatively weak light, I can barely see things.

Bo found his sleeping mat outside, lay down, and soon fell asleep again.

When Bo woke up again, the sun had risen quite a bit.

Many people in the tribe have already gone to the fields.

Those who were in charge of cooking were cooking there. Plumes of smoke were rising up, carrying a strong smell of fireworks, which made people feel comfortable just by looking at it.

When Lame woke up, he soon heard some conversations from those who had participated in the shipbuilding with him.

They were wondering why everyone went to sleep, but when they woke up, all the improvements on the sailboat's rudder had been made.

After someone suggested that someone got up in the middle of the night and secretly did the deed, others began to speculate who did it.

Listening to these people's discussions, Lame, who was still lying there, couldn't help but reveal a faint smile on his face.

Then he slowly sat up, pretending to have just woken up, rubbed his eyes with the back of his hand, and then squinted his eyes and looked in the direction of the carpenter's room and the people who were talking there.

It was as if he had no idea what they were talking about...

Han Cheng already knew about this.

Standing at the door of the carpenter's room, he looked at the lame man who limped here, and then pretended to be like the others, looking at the modified sailboat with surprise, as if he knew nothing, and couldn't help but smile helplessly.

This guy!

Even after such a long time, I still can't change this habit of being in a hurry to work.

Han Cheng was touched and felt particularly distressed by Bo's behavior...

“Clatter…”

With the sound of water, the sailboat with its white sails lowered was once again lifted out by the people of the tribe and put into the water.

Four sailors who had been steering the sailboat for most of the day boarded the boat.

One of them was carrying a large ship rudder shaped like a fish tail on his shoulders.

The man carrying the rudder went straight to the stern of the sailboat.

Lame stood at the edge of the dock and verbally instructed the man how to install the rudder on the stern.

This task was not difficult. Under his guidance, the man quickly completed it and installed the rudder on the stern.

However, at this moment, there has been a significant change in the connection between the rudder and the stern wooden pillar compared to before the modification last night.

The most significant change was that the iron rod originally used to fix the rudder and the wooden pillar together disappeared and was replaced by a thumb-thick leather rope made from multiple thin leather ropes.

After this sailor installed and tied the rudder, the other three sailors quickly raised the three lowered sails.

Seeing that everyone was ready, one of them walked to the bow, jumped onto the dock, untied the rope and threw it onto the bow.

Then he stretched out one leg and pushed the bow without much effort, and the whole boat left the dock and slid backwards.

He also took advantage of this opportunity, exerted a little force on the dock with his other foot, and came onto the boat.

The sailor standing at the stern, holding the upper handle of the rudder with both hands, saw this and began to imitate the way of a fish swimming in the water, swinging the rudder left and right in an attempt to make the sailboat turn.

At this time, the wooden board underneath the rudder, which was shaped like a fish tail, had been inserted diagonally into the water and was completely submerged in water.

As the man swayed left and right, the submerged fishtail-shaped rudder began to sway left and right, stirring the water. It really looked like a fish's tail swaying in the water.

After the leather rope at the joint replaced the iron bar there, the maximum left and right swing range of the rudder was increased.

Although it cannot reach the level of real fish, it is a big breakthrough compared with the previous time.

This is the result after Bo thought about it for a long time and spent some time to transform it.

Following the actions of the sailor at the helm, the people standing on the shore or the dock, as well as the three sailors on the sailboat, all perked up at once, looking at the sailboat with bright eyes, wanting to see whether this rudder was easy to use and whether it could bring them miracles!

Sure enough, the miracle happened soon!

"Bang!"

A loud noise was heard here at the dock by the river.

The sailboat that had just left the dock actually returned to the dock at this time and made a very intimate contact with the dock.

It was as if he was extremely reluctant to part with the pier.

Looking at the bow of the sailboat colliding with the dock, the group of people standing here waiting to witness the miracle could not help but look at each other.

I didn't know what to say, and there was silence for a moment.

Isn't it agreed that the rudder is used for turning?

How come after it started swaying, the sailboat not only didn't turn, but instead returned back?

This thing that I and others spent a while to research and manufacture is specifically for sailboats to turn, but why does it look like it doesn't make the sailboat turn at all, but instead looks like it is specifically pushing the sailboat forward?

Han Cheng was also a little confused.

Logically speaking, whether from the perspective of biological simulation or from some knowledge about the rudder that I remembered, such a thing should not happen.

The rudder is what actually controls the direction of the boat...

But looking at the sailboat in front of him that was making close contact with the dock, Han Cheng's certainty became less firm.

Could it be that I really remembered this matter wrongly?

However, this doubt did not last long.

Not long after, Han Cheng's heart moved, and a picture suddenly emerged in his mind -

Under the night sky, a huge river stretches across here like a pitch-black abyss.

Snowflakes kept falling from the sky.

There was a vast expanse of white snow on both sides of the river.

The dry and withered reeds, as well as the bare branches that had lost all their leaves, were all covered by the heavy snow and had lost their original shape.

It was at this time that some creaking sounds, similar to the sound of wood rubbing against each other, could be faintly heard on the quiet river surface.

There was also the sound of some gentle waves.

A man stood at the stern of a ship, facing one side.

He placed his hands on an inclined wooden bar at the stern, swaying back and forth.

As this man moved, the boat floating on the river continued to move forward.

When the boat reached the wide center of the river, the man let go of the wooden handle and dropped the anchor into the river and stopped.

Then he quietly came to the cabin with another person on the boat, quietly tied up a sleeping person, took out a knife from under a wooden board, put it on the neck of the person who had been awakened, and robbed him.

And asked this person whether he wanted to eat chaos or...

This is a scene from "Water Margin".

It tells the story of Song Jiang who is in critical condition due to a serious illness. In order to save Song Jiang's life, Zhang Shun, the White Shark in the Waves, crosses the river overnight to look for the Earth Spirit Star and the genius doctor An Daoquan to come and treat Song Jiang. However, because he was too sleepy, he fell asleep in the cabin while crossing the river. He was tied up by the gangsters who robbed him of his gold and silver and threw him into the river.

This TV scene that Han Cheng had watched in later life appeared in Han Cheng's mind.

Han Cheng's attention was not on Zhang Shun, but was all focused on the blurry ship.

To be precise, it was placed on the wooden bar that was being shaken by the boatman to control the boat forward.

Moreover, the wooden bar in my memory is now gradually overlapping with the wooden bar behind the stern of the sailboat in front of me...

This thing doesn't seem to be called a rudder, but should be called an oar!

It's the kind of oar that can bring pleasure when done a little, but hurts your body when done too much, and will turn your mast and oars into ashes!

This is also the thing that can control the ship's navigation in the water!

This thing is different from the oars. It is not on the sides of the boat, but installed at the tail of the boat, just like the one installed on the sailboat of my tribe...

After recalling these memories, Han Cheng fell into confusion again.

What the hell is going on here!

I clearly wanted to make the rudder, but why did I end up making something like an oar?

Han Cheng was confused, and so was everyone present.

In this confused state, several people on the boat looked at the technical experts on the shore, and saw that these experts did not speak to explain the current situation. After waiting for a while, the man standing on the bow came to the dock, stretched out his foot again, pushed the sailboat away from the dock, and retreated to the back.

And he once again took the opportunity to step onto the sailboat.

The sailor, holding what at this time was not sure whether to call a rudder or an oar, waited until the force of the sailboat's backward movement completely disappeared and the sailboat was about three or four meters away from the dock before he began to hesitantly and slowly crank the wooden handle again.

As he rowed, the sailboat quickly started moving again and continued to move towards the pier.

Seeing this, the man quickly stopped rowing to prevent the sailboat from sliding forward too much and hitting the dock again.

While maintaining this action, the 'rudder' he was holding in his hand was not kept in the center position, but he subconsciously pressed it tightly against the wooden pillar, causing the wooden fish tail in the water to deviate to the right as much as possible.

The boat floats very lightly in the water, especially a small boat with a shallow draft. Even after the propulsion stops, it can still slide forward a long distance.

Therefore, even if the person at the back who was shaking the "rudder" had stopped his hand and ceased his movements, the sailboat was still gliding slowly forward.

The object they wanted to hit was still the pier in front.

The man standing on the bow has already raised one of his legs.

He prepared to wait for a while until the sailboat got close to the dock but still couldn't stop, so he pushed the dock with one foot and used his own strength to stop the boat to prevent it from hitting the dock again.

It was at this moment that he suddenly discovered that the bow of the ship, which was originally heading straight towards the dock, was actually turning slowly. The direction the ship was turning was to the right, which was the deep part of the river.

In the end, the man's raised foot did not touch the dock.

When the bow of the boat was less than thirty centimeters away from the dock, it just turned around and changed its direction from crashing into the dock to heading into the river.

The people on the boat couldn't help but look up at the sail, wanting to see if it was the wind that blew the sailboat around?

Obviously not, because at this time the small piece of cloth that served as a weather vane did not flutter at all.

"It's the rudder!"

Han Cheng on the shore pointed at the fish tail that leaned to one side and said this.

It was at this time that he realized that the fish's tail could not only be used to turn, but also to drive the fish forward...