I have been farming since I crossed over.

"Waterwheel principle? What on earth is this?" Lu Qin muttered suspiciously, his brows tightly furrowed, obviously very confused by this unfamiliar term.

Seeing this, Lu Jintang quickly stepped forward and tried to smooth things over with a smile:

"Oh, actually, this is not a particularly profound statement. It's just a small trick. Let's just call it the waterwheel principle." When saying this, Lu Jintang secretly sweated in his heart.

Yang Mingxi had mentioned this matter to him before and had given him a general description, but not in great detail.

He was afraid that Yang Mingxi would accidentally say something wrong and get exposed, so he hurriedly stepped forward to help.

Hearing this, Lu Qin's curiosity was completely aroused.

He couldn't wait to ask, "Oh? So what exactly is this saying? Tell me about it quickly, maybe it can come in handy!"

Lu Jintang calmed himself down, organized his words, and then explained slowly, "Well... basically, it's like this: there's a rotating shaft in the middle, and buckets of water are installed around it. Then, just step on it a few times, and it will automatically pump water. The main function of this device is to transport water from low-lying areas to higher ground."

After listening to Lu Jintang's explanation, Lu Qin nodded thoughtfully.

Suddenly, his eyes lit up, and he slapped his thigh excitedly and said, "Haha, I get it! So, if we apply this principle to a ship, when the ship starts sailing, it will inevitably drive the surrounding water to flow. And this stirred water will naturally fall back. In this way, we can cleverly use the force generated by the water level difference to continuously propel the ship forward. Hey, this idea is really brilliant!"

"Indeed, precisely because this ship's net weight is so enormous, the requirements for the power system are correspondingly increased. After careful consideration, an idea emerged:

Why not utilize all the available energy? This way, we can effectively solve the current problems. What do you think? Yang Mingxi patiently explained her idea to Lu Qin, staring at him intently, observing his reaction.

After listening carefully to what Yang Mingxi said, Lu Qin's eyes flashed with a hint of sudden enlightenment. He nodded excitedly and said, "Madam is really wise! You can come up with such a clever method. It is really admirable!" His words revealed his sincere admiration for Yang Mingxi.

Yang Mingxi smiled slightly and responded modestly, "You're too kind. Actually, it's just that I have a wide range of knowledge. The more I see, the more I can think of. In my opinion, if you have the opportunity to leave this world and travel the outside world, you will definitely benefit a lot from this experience. After all, reading a thousand books is not as good as traveling a thousand miles!"

When she said this, a hint of regret that was hard to conceal slipped into her beautiful eyes.

She couldn't help but sigh in her heart, feeling that Lu Qin was so young, but had been detained here for more than ten years.

Lu Qin smiled and replied in a relaxed tone, "Don't worry. I'm sure there will be opportunities to go out more in the future. As long as the time comes, I will embark on the journey without hesitation."

While they were talking, the hull of the boat had been successfully assembled.

Lu Qin stood a little further away, his eyes fixed on the boat in the distance. After observing it for a moment, he said, "Okay, let's go over and see how well this boat floats. By the way, you can give us some suggestions!"

Hearing this, Yang Mingxi quickly replied with a smile, "Oh, to call it advice is an exaggeration. At most, I can offer you a little bit of advice!"

In this way, Yang Mingxi followed Lu Qin and Lu Jintang and walked slowly towards the beach.

Soon, they arrived at the shallows of the sea.

There I saw a huge ship parked there. Its appearance was so magnificent that it was almost as tall as a two-story house.

The boat was crowded with people coming and going, and it was very lively.

When he got closer, Yang Mingxi was surprised to find that the ship was much larger than he had originally imagined.

A rough estimate shows that the height of this ship is about 10 meters, and the entire hull is as wide as a small square.

As for its exact size, Yang Mingxi really couldn't tell for the moment.

Faced with such a huge thing, she could only sigh inwardly: Poverty really limits my imagination!

"How should I test his floating ability?" Yang Mingxi stood on the shore, staring at the huge ship, frowning slightly, and muttered to himself.

After a while, as if she had thought of something, she turned to look at Lu Qin beside her and asked softly, "Do you have any good ideas?"

Lu Qin's lips curled up slightly, revealing a confident smile. He replied, "That's easy! We can simply load the ship with the appropriate amount of grain or other heavy objects, and then see if the ship can withstand the weight without sinking. That way, we can determine its buoyancy."

Hearing Lu Qin's words, Yang Mingxi opened her mouth in surprise and said in disbelief: "But do we need manpower to carry so many heavy things onto the boat? Can we really carry them up?" Obviously, she had doubts about whether this plan could be implemented smoothly.

Lu Qin waved his hand nonchalantly and consoled him, "Don't worry, there are still many people here! If they work together, there will be no problem. We don't need to worry about it."

Lu Jintang, who was standing aside, took Yang Mingxi's hand and walked towards the big ship, saying as he walked, "Come on, I'll take you to visit the structure inside the ship."

Lu Qin followed behind, and the three of them walked towards the boat together.

The only thing missing from the entire ship is the crucial power system; the rest is basically ready.

Yang Mingxi stood at the side of the boat, his eyes slowly sweeping over the people who were struggling to carry heavy bags onto the boat.

They bent over and took difficult steps. Beads of sweat slid down their foreheads and soaked their clothes, but they still gritted their teeth and persevered.

Seeing this scene, Yang Mingxi couldn't help but feel an indescribable bitterness in his heart.

In this ancient time when the level of mechanization was extremely backward, labor force undoubtedly became the core force driving production and development.

Every bit of lifting and every drop of sweat reflects people's hope and efforts for life. Seeing these hardworking people in front of Yang Mingxi made her deeply appreciate the hardships and difficulties faced by the working people.