Yu Ren went over. Sure enough, the person who had been hiding in the dark and secretly watching their every word and action was none other than Xu Shichang, the son of the Xu family. However, he did not have a single servant with him at this time.

Fatty Xu was startled when he saw Yu Ren walking towards him.

Only then did he remember that he had discovered such an important secret of someone else, yet he stupidly screamed out loud and let the other person find out. It seemed that his life might be in danger. But he also knew

, relying on my own speed of movement, it is absolutely hopeless to race against Yu Ren and the others.

So in the end, Fatty Xu made the wisest choice - sit back and wait for death.

Yu Ren walked up to Fatty Xu. He did not draw his sword or dagger. Fatty Xu kept staring at Yu Ren's hands nervously. Although he did not intend to run, he did not give up resistance. He was waiting for Yu anxiously.

Ren's sentence against him.

Fatty Xu was just wondering how Yu Ren was going to deal with him, when he saw Yu Ren suddenly reaching out to him.

"Want to come with us?"

Fatty Xu was stunned for a long time, as if he didn't understand Yu Ren's words, and then nodded heavily.

"Okay, then let's study together how to make the next hot air balloon!"

In this way, Yu Ren easily deceived Fatty Xu out of the woods where he was hiding, and pulled him onto their pirate ship.

Although Huang Wu and Cao An both opposed Fatty Xu's participation, Yu Ren was determined to let Fatty Xu participate. Huang Han did not speak. In the end, the two had to give in.

That night, a few people spent the whole night studying in this small stone house in the mountains, but no one went back. When it was almost dawn, Yu Ren felt that he should have thought more carefully. Then he re-printed his design

Mark it out on a piece of paper, then mark the dimensions on it, and finally write down the materials used for each part on it.

After finishing all this, Yu Ren lay down on a straw mat in the room.

Yu Ren got up after three strokes on the second day. When he woke up, he found that he and Cao An were the only ones left in the room. He thought that what he encountered yesterday was just a dream at night.

"What about them?"

"They all went down the mountain to collect materials. Fatty Xu was afraid that the fifty taels of silver in Huang Han's hand was not enough, so he went home to get the money again."

Yu Ren was surprised. "Isn't fifty taels enough?"

"My Lord, what's so strange about this? Don't even think about it. What materials did you choose? The frame must be made of light and strong iron, and the balloon cloth must be sewn with animal skin, and then you have to sew it.

Sealing the joints. How much skin would be needed to make such a big hot air balloon?

This is also the largest expense in our production. Even if we use the worst leather, I estimate it should cost at least sixty or seventy taels of silver."

"So many!"

Yu Ren began to regret his decision to choose animal skins to make a hot air balloon, but for the time being he could not think of a better alternative material. In this dynasty, he really had no better material to replace animal skins.

It was not breathable and not too heavy. Therefore, he could only secretly warn himself in his heart that this time, he must be careful not to let the hot air balloon fall into the mountain stream again.

He spent a lot of money to make this. Even if it doesn't succeed this time, the materials must be reused in every possible way. Otherwise, they will go bankrupt after just a few uses.

On this day, Yu Ren felt that time passed a bit long. The three people who went down the mountain, except Huang Wu, went up the mountain at noon, and he brought back some food and sundries; Huang Han and Fatty Xu had not come back yet. Yu Ren began to cross the mountain.

He felt more and more the inconvenience of not having telephones in this era. So he had to take out the drawing he designed and go through it again and again. He hoped that this time, they could succeed. Otherwise, he would fail after repeated failures like this.

I worry that I will soon become a pauper again.

In the afternoon, Fatty Xu hurried back to the mountain. He said that he had gone to buy materials for Huang Han, so he came back late. Yu Ren did not blame him, so they sat together again and studied the possible problems with this drawing.

.

It was almost evening before Huang Han returned to the mountain. He also brought two other teenagers with him. Both of them were of the same age as him.

"This is Li Fu. Their family is a family of carpenters. The strange wooden tools in my house that are now useless were made by him." Huang Han pointed at a tall, slim young man.

Yu Ren nodded towards Li Fu, indicating that they knew him.

"This is Liu Datou. Their ancestors were blacksmiths. Datou's craftsmanship is no worse than that of his father. We are all close friends who grew up together. When I was making fire dragons, they came to see me many times.

They also gave me a lot of help. I told them that we are going to make a big ball that can fly into the sky this time. After hearing this, they all wanted to participate." As he said that, Huang Han looked at

Yu Ren. Obviously, although he is the owner here, he thinks that Yu Ren is their real leader now.

"Welcome, welcome!" Yu Ren was genuinely happy about the arrival of Li Fu and Liu Datou.

With the addition of Li Fu and Liu Datou, Yu Ren's research team has become much stronger. Especially because one of them is a carpenter and the other is a blacksmith, they have enough understanding of the current level of craftsmanship. This

It also helped Yu Ren to know which designs can be achieved when designing a hot air balloon, and which ideas cannot be achieved by current technology and need to find alternative methods.

Yu Ren spent several days in the mountains. In order to get a hot air balloon out, he almost forgot to eat and sleep. Yu Ren has now realized that it is very expensive to build this thing. In order to save money, he went up the mountain for the first time.

The next day, Cao An asked Cao An to check out the high-end inn where they stayed in the west of the city, and moved their luggage to Huang Han's shop.

Several people nested in the mountains, vowing to realize their dream of flying into the sky.

Their meals are brought to them every day by a servant of Fatty Xu’s family. This servant has been Fatty Xu’s follower since he was a child, and he is also a person whom he can absolutely trust. Therefore, everyone does not need to worry that their affairs will be disclosed by the adults of each family.

Find out, and then drive them back.

Of course, except for Yu Ren and Cao An, the rest of them have homes in the city. Every day they go up the mountain early in the morning and go down the mountain in front of the city gate. At night, Yu Ren and Cao An are the only ones left in the stone house.

Two people.

Early that morning, Yu Ren was revising the design drawing for a poorly designed location, and Fatty Xu rushed up the mountain in excitement.

"Why are you so happy? Are you picking up gold or your wife?" Yu Ren didn't even look up, still modifying his design. "Come and help me take a look, will it be safer after this change?

?”

Yu Ren initially invited Fatty Xu to join. To be honest, it was all because he fell in love with him, the God of Wealth. He hoped that he could help solve some financial problems in their research. However, he soon discovered that, in fact,

He was completely wrong. Although Fatty Xu didn't look very good, he was absolutely ingenious and had a strong interest in tinkering with these novel gadgets.

What pleased Yu Ren the most was that Fatty Xu must have read books. Although he did not learn the Four Books and Five Classics well and failed to pass the exam, he still had a good foundation. In the past few days, Yu Ren asked him to go home and read more.

"Nine Chapters of Arithmetic" and other practical science books. During the day on the mountain, he taught him some common principles in modern physics.

Every time he talks about some principles of modern physics, Yu Ren always calls everyone together.

Soon, Yu Ren discovered that Fatty Xu's understanding in all aspects had gradually surpassed that of Huang Han, not to mention Huang Wu, Li Fu and Liu Datou.

When he first joined, Fatty Xu was very low-key. Everyone only regarded him as an errand boy. But soon, several people began to discover his talents. So far, in just a few days, he has become a hidden talent.

After becoming Yu Ren's first deputy on this project, he began to direct Huang Han and others.
Chapter completed!