He Jiayin stood up: "What's wrong with this book that warrants detaining our people?"

The same officer said, "We need to study this book carefully. This lady must stay and cooperate with our investigation. You can go now; boarding is about to begin."

How could this be? He Jiayin sat back in her chair: "This is absolutely impossible. I must bring back the same number of people I brought out. You say there's a problem with the books, you must explain what the problem is!"

Detaining Yao Yanxin was a last-minute decision; they just wanted to detain someone randomly to give their superiors an explanation. But when asked to explain, they couldn't come up with anything convincing.

He Jiayin ignored them and exuded an aura of authority: "Do you know who gave her this book?"

The officer picked up the book and looked at it. It said that it was a gift from Smith to Ms. Yao. He couldn't believe it: "This was a gift from Smith?"

Smith was very famous in the United States, to the point that almost everyone knew him. But why would Smith send a book to this middle-aged woman?

"Please call Smith and have him come over and explain why the books we sent to Ms. Yao can't leave the country?"

This stunned everyone. They really just wanted to find a pretext to detain him. If Smith were to come, things would get much worse!

After much discussion, they decided to release Yao Yanxin. If Smith heard the news, he would definitely send a lawyer with him.

That way their trick of making things difficult for people would be exposed. They really had no other choice but to apologize and release the people. Fortunately, the plane hadn't taken off yet, otherwise they would have had to arrange accommodation for them.

When Yao Yanxin heard that she could walk, she seemed to come back to life. When she tried to move, she realized that her muscles were stiff.

Yao Tongjia quickly helped her mother walk outside. She had just been thinking that if her mother was detained, she would definitely stay and keep her company.

She would definitely have to go back to Smith for help. Fortunately, those people released her as soon as they heard Smith's name. Alas! In the past, history had always glossed over the humiliation suffered by Chinese people abroad.

But hearing about it is one thing, and facing it yourself is another. I never imagined it would be so cruel, that even leaving the country would involve such humiliating demands.

As the leader of the delegation, He Jiayin had to have a gun pointed at her head and couldn't even use her fists against them, for fear that they would use this opportunity to start a war. The country needed a stable transition.

Once on the plane, Yao Yanxin finally felt relieved. She had been so afraid of being left alone in the US, as if she had suddenly returned to a time when she was at the mercy of others.

The passengers on the plane were not in high spirits. They silently resolved to seize every minute to conduct research when they returned, and to use their scientific research capabilities to improve the country's strength.

Seeing that Yao Yanxin had calmed down, Yao Tongjia leaned her head on Xiao Gengwu's shoulder. Xiao Gengwu was clearly distracted today as well.

Yao Tongjia thought of something: "Are you also required to take off your clothes for inspection over there?"

Xiao Gengwu nodded: "Yes, later, several professors who had studied here argued strongly and even asked to bring their classmates over, which saved them from having to take off their clothes for inspection."

"Tongtong, I'll have to work extra hard when I get back this time, so I guess I won't be able to spend much time with you!"

Yao Tongjia understood what Xiao Gengwu meant: a weak country is bullied and its people are bullied. She had felt this deeply in her own country before, but after being humiliated here, she realized the importance of a strong country.

Yao Tongjia nodded: "It's okay, we'll work hard together. I don't need you to be by my side all the time, I can take care of myself!"

Xiao Gengwu held Yao Tongjia's hand tightly: "I'm sorry, I guess I'll have to break my promise. I said before that I would have dinner with you every day from now on!"

"As long as you are loyal to me, what does it matter whether we eat together or not?" Yao Tongjia was also feeling bad. She secretly made up her mind to speed up her pace and try to earn more money!

The group returned to their country in low spirits. Yao Tongjia sent her mother back in the car sent by Ruan Shengpeng, while she went to the research institute with Xiao Gengwu.

Once on her own turf, Yao Tongjia went to the restroom and took out all the things she had written: one was about the operating system and the power system, and the other was about the principles of the operating system and the power system.

The principle that Yao Tongjia presented made everyone ecstatic. With this principle, they could almost directly copy the homework. As long as they had all the materials, they could quickly build the same fighter jet.

Xiao Gengwu picked up the principle and looked at it. He knew that Tongtong must have gotten something, but he didn't know that it was such an important thing. He was immediately scared and broke out in a cold sweat.

If Yao Tongjia hadn't had some secret connections, and if they hadn't conducted a body search and luggage search like at the airport, this document would never have been brought out.

After everyone calmed down, some of them were sweating: "You're too bold, girl. Where did you get this from?"

No wonder the airport was suddenly locked down when they were leaving the country; they probably realized that the manufacturing principle had been leaked!

There's no use being scared now, since the items are already in hand. He Jiayin quickly used the photocopier to make copies, so that almost everyone got a copy.

Xiao Gengwu examined it carefully again and again: "Judging from the current situation, the only country that exports the rare earth metals needed for this fighter jet is M."

"If we import rare earth metals from them now, will they give them to us? Will they let us go?"

Asking them for rare earth metals is tantamount to admitting guilt. It's like saying they stole our principles and now we're trying to copy their work.

What should we do now?

Xiao Gengwu dropped another bombshell: "Our country also has rare earth metals, which we mine ourselves. Of course, we can't let outsiders know until we've built our fighter jets!"

Professor Zhu criticized Xiao Gengwu, saying, "We do not yet have the capability to mine rare earth metals!"

"I knew before I went abroad that fighter jets needed rare earth metals to be manufactured. I researched a lot of information and also asked my partners to do the research. We will come up with a solution as soon as possible!"

Everyone was stunned. They had gone out to see if they could learn anything from others, but it seemed that none of them had done their homework before leaving.

This young man, however, was taking one step at a time, already having sent his companions to research the mining of rare earth metals. Professor Chen looked Xiao Gengwu up and down: "Are you a student from Huada University?"

Xiao Gengwu nodded: "He is a graduate of Huada University, majoring in weapons!"

When everyone heard that he was a student at Hua University, and majored in weapons, they became very interested!