This great inventor introduced his designs in detail, and talked about the purpose in a incoherent manner.

"Flying birds are still a model. We need to make a big one, linkage, device linkage, install wheels at the bottom, and you push them back, I'll control the simulated wings..."

Xiang Du couldn't think of how this thing should go to heaven. He thought that instead of making a big guy, it would be better to install wings on people.

He told this idea, but it was the education of a great inventor with thin hair: "You don't understand science, it doesn't matter, but you should think about it with your brain, copying the flight mode of birds is the fastest

Route. If you put wings on humans as you said, will your arms be tired?”

"Why aren't birds tired? They also fan at once."

"You don't understand, birds have small wings and don't need much strength when exercising, so they won't be tired. This is science."

Xiang Du always felt that this was very reasonable, but he also felt something was wrong. He repeatedly asked this question, which made the old inventor ask.

"You will understand scientific matters in the future. Let's take a look at the next one."

The two of them walked down the open house, and on the pillars of the third and fourth rooms, there was a wooden board hanging, and a lot of things were drawn with chalk on the board.

The old inventor stood in front of the wooden board and entered the explanation with a teaching stick: "This is also designed by me. I haven't made a model yet. You may not understand it. I'll explain it to you. Our current journey is still based on horses.

Right? Matthew is in trouble. He needs to be fed and excreted. The most important thing is that he can only run that far every day.

In order to solve this problem, I thought hard for months, overturned countless sketches, and finally came up with a solution. We need to build a lot of hanging wooden tracks, and then hang this pedal-type car on the track, just use

If you step on your feet, the railcar can move forward.

I plan to lay the land from the capital to the valley, with two tracks in total, one north and the other south. Every city that passes by will have branch tracks. You may be considering the human resources issue, so don't worry about this, just pedal

If you step on it once, the car can travel ten meters or even more."

Xiang Duting was confused and nodded slowly with a serious expression. He was impressed by this wild imagination.

"Look at this again." The old inventor was excited and led Xiang Du to the fourth house.

The fourth house is home to a lot of wood structures, which seem to be part of some kind of installation and have not been assembled.

The old inventor said that he was excited, so he pulled Xiang Du to the front of another wooden board to explain.

"Our boats use wind as power and rely on sails to move forward. This is too low in efficiency. In places without wind, we need to extend the oar and rely on manpower. In order to solve this problem, I have created this, and at present, I still have to do it.

During assembly.

You should be able to tell that this is a ship, right? It’s not much different from a normal ship, but you don’t need a sail. You can guess boldly, what’s the power?”

The old inventor looked pleased and looked forward to Xiang Du's answer.

"I can't think of what else can be used as motivation besides wind."

"Stupid! I ask you, what is the most common thing at sea?"

"fish?"

"Water! The most is water! My boat is powered by water! Infinite!"

"What's the thing?" Xiang Du was stunned by the words, "Water? How to use it? Will it not sink?"

The old inventor smiled mysteriously. He found a propeller from the various pieces of the room and introduced confidently: "Put this behind the ship, connect it with a pipe, and insert the other end of the pipe into the sea.

As long as it rotates, it can push the ship forward, and the ship can absorb more water when it moves forward. Similarly, as long as it absorbs water, it can rotate, and as long as it turns, the ship can move forward.

You can imagine that if water is used as energy, it will be endless, and, taking it from water and using it for water, perfectly forming a closed loop."

"Wait a minute, let me think about it."

Xiang Du's brain rotates rapidly, drives it with water, and drives it, and drains it out again. Isn't this just a waste of time? It sounds like a great invention, but it's too advanced, but no matter how you think about it, you feel it's completely feasible and can't find the logic

The confusion on it.

Seeing Xiang Du's appearance of being completely shocked, the old inventor was proud from the bottom of his heart, and he took Xiang Du to the back rooms to see.

The three houses in the future were used for processing parts. Many eliminated machines in factories were everywhere, with wood chips piled up, and all kinds of tools such as rulers and hammers were available.

There is also an experimental lathe, the type driven by the waterwheel, but now the river has dried up and the lathe has lost its power.

According to the old inventor, the water flow is too slow and the power is seriously insufficient.

In other words, this plan should be feasible.

Anyway, Xiang Du was impressed, and he even felt that this inconspicuous long house represents the most cutting-edge technology of the country.

If a person has to do something meaningful, scientific research is also a great choice.

Xiang Du thought so, it doesn’t matter whether it’s money or not, what’s important is the meaning.

After watching three processing workshops in a row, there were still the last two left. He was full of expectations for these last two.

The penultimate house is quite messy, with half a wardrobe, a bed, and a stove. Then, there is nothing left.

This is the living room.

Nodding, you should have a place to live, which is reasonable.

If the incredible creations I saw before were ahead of time, then what happened next was already ahead of time and could not be ahead of time.

The last house was the only house equipped with an iron door. There were three locks on the iron door. The old inventor opened the lock one by one, with a solemn expression, as if he was doing something extremely sacred.

"Young man, what you want to see below is the greatest achievement I have in research and development." The old inventor with a serious expression opened the door, "I didn't want you to see it, but when it was successfully developed, all

Everyone in the world knows it.”

Xiang Du walked into the room where he could not see his fingers. The old inventor lit an oil lamp. The fire drove away the darkness. The first thing that illuminated was a statue of god.

The statue was obviously carved by non-professional people. Although some things can be seen, the sculpture technology of the entire statue was too clumsy.

The statue of God was in a terror, with both hands trying hard to block it. Wherever the hand reached out, there was an iron box, two meters square.

With the permission of the old inventor, Xiang Du lifted the buckle cover of the box, and there was nothing inside it.

"Is this an empty box?"

Xiang Du came to the conclusion after repeated inspections.

"No, this is not a simple box, this is a time machine."

The old inventor said proudly, Xiang Du was full of questions.

"What's time?"

"Time machine, young man, have you ever enjoyed it, people can go back to the past or reach the future."

"Full...nothing." Xiang Du pointed at the empty box, "I don't understand."

"This is science. Young people, do you still have regrets in your life? Just imagine how many regrets you would make up for if you had the opportunity to travel through time and go back to the past?"

"In other words, can I go back to this morning and go see Your Majesty with my family?"

"It's totally OK, but I suggest you take a long-term view."

“How long?”

“How far is it going.”

Then Xiang Du began to think that in this land with barren knowledge, the farthest place he could think of was five days ago. If he had not shaved with a razor five days ago, he would not have been injured on his face.

If he thinks harder, he can't remember it anymore. However, because he can't remember it anymore and is also considering the possibility of traveling through time, he couldn't help but ask: "Is this thing really feasible? Have you tested it?"

"Half done?"

"What's the meaning."

"I put a stray cat inside a few days ago. An hour later, the cat disappeared. When I found it, it was obviously older and had one leg injured. So..."

"So?" Xiang Du's mind was not enough.

"So it must have returned to an earlier time. Young people, when I succeed, the gods will be as scared as this statue."

The old inventor was too excited and started dancing.

However, at this time, Xiang Du's mind turned around again and he asked a fatal question: "If you really succeed, why haven't you come to find you now?"

The old inventor fell into long-term contemplation.

After several minutes of contemplation, he gave an explanation: "There are only two possibilities, either I didn't come to find myself for scientific reasons, or my invention failed, but the latter possibility is not

big."

"Oh well."
Chapter completed!