Seeing her brother's silly look, Gu Yingying strode over and protected Chao Yan behind her. "Brother, what are you doing? You scared Yan Yan."

"Yes, I'm sorry, I, I was too excited just now," Gu Shizhen couldn't help but get excited when he saw Chao Yan.

"Sister Chao, is what you just said true? Did you really agree?" Gu Shizhen confirmed again and again uncertainly.

"I agreed," let's date for a few years first and then get married. She is still young.

Let’s wait until the high-speed rail is researched.

"Brother, Yanyan, what are you talking about? I don't understand." Gu Yingying looked at her brother and best friend with a confused look on her face.

Although she was not far away, she couldn't hear it clearly.

"That's great," Gu Shizhen pushed Gu Yingying aside. This annoying little sister blocked Chaochao's view.

Gu Shizhen hugged Chaoyan in his arms and said, "Thank you, Chaochao, thank you for choosing me!"

Gu Yingying widened her eyes and pointed at the two of them. No, it’s just been a while. What’s going on with them?

However, seeing the two of them together, Gu Yingying was happy but also sad.

She intuitively felt that her brother was not worthy of Yanyan, but she also felt that it would be great for Yanyan to be her sister-in-law.

She often hears people say that sisters-in-law and sisters-in-law have difficulty getting along, but if this person is her best friend, she won't have such troubles.

"No, brother, Yanyan, you, you are together?" Gu Yingying pointed at the two of them, her hands shaking. What just happened?

Gu Shizhen let go of Chao Yan and looked at Gu Yingying seriously, "From now on, you must call me sister-in-law!"

Gu Yingying was silent and looked at Chao Yan, only to see that the other party also nodded.

Gu Yingying had completely given up hope because her best friend was abducted by her brother.

But on second thought, well, it’s actually not bad. I won’t be separated from my best friend in the future.

"Brother, sister-in-law, congratulations. When are you getting married?" Gu Yingying figured it all out and now all she could do was give her blessings.

"Gu Yingying, why are you asking so many questions!" Gu Shizhen looked at Gu Yingying with a cold face, and Gu Yingying looked at Zhao Yan eagerly.

"Why are you so fierce? Yingying, let's go," Chaoyan pulled Gu Yingying away.

Gu Shizhen was confused. How could he be fierce? He had always had this attitude towards Gu Yingying.

When Gu Yingying was being dragged away, she turned around and made a face at Gu Shizhen, which made Gu Shizhen very angry.

After Chao Huaiyi found out about Gu Shizhen and Chao Yan's relationship, Gu Shizhen was beaten again, but he was not seriously injured.

Fang Huaye and Han Chengqi called Gu Shizhen a beast for doing such a thing, but since the two of them were together, they could only wish them well.

It’s not like he can’t see that Chao’s sister doesn’t have any feelings for them.

One by one they threatened Gu Shizhen, saying that if he dared to treat Chao Yan badly, they would not let Gu Shizhen go, and so on.

Gu Shizhen could only nod. After all, he was the one who got the upper hand, so he could only let these brothers teach him a lesson.

Gu Shizhen and Chao Yan's relationship was open to the public, and many people in the military camp knew that Chao Yan and Captain Gu were together, and they kept praising the two for being a good match.

Asagao also successfully borrowed the book, read it so intently that she forgot to eat and sleep, and even drew the prototype of a high-speed rail.

"Sister, this, this is your drawing?" Chao Huaiyi asked as he picked up the drawing. Although he had not read many books, he was literate.

Moreover, after coming to the military camp and getting to know people like Gu Shizhen, I naturally read a lot of books and learned a lot of science.

"Yes," Chao Yan nodded. Now they had to rely on this blueprint to go to the research institute.

"Sister, you know this blueprint is not simple, right? Can it really be realized?" Chao Huaiyi couldn't believe that his sister had such a smart mind.

"Of course I know, second brother, I want to shine for my country!"

"Host, isn't it because riding trains is too uncomfortable that you decided to research high-speed rail?" The system said, clearly unable to endure hardship, yet insisting on describing yourself as so great.

This is its host.

[Shut up, I can do whatever I want. Humph, isn’t I contributing to the development of the country now?] Chao Yan was exposed by the system and became a little angry.

Dog system, I'll beat it up when I get back.

The system trembled and dared not make a sound. It ran directly to the small dark room. It wanted to watch TV series and ignored the host.

After hearing Chao Yan's words, Chao Huaiyi was so moved that he almost cried. His sister had grown up, really grown up.

"Sister, you have grown up and become sensible," Chao Huaiyi looked at Chao Yan with red eyes.

Finally, Chao Yan gave the blueprint to Chao Huaiyi and asked him to hand it over to the person above.

After seeing the drawings, the superiors were shocked and excited. After expert research, they found it feasible and immediately sent people to the military camp to pick up Chaoyan to study together.

After Gu Shizhen and others knew about it, they could only say congratulations. Gu Shizhen hugged Chaoyan and said goodbye to her.

Once I enter the laboratory, I don’t know when I will be able to meet him again, and Gu Shizhen is very busy as a battalion commander.

Three years later

High-speed rail has been researched a long time ago and has even been built and is ready for use.

Asagao is still in the laboratory, doing other experiments every day.

Chaoyan and Gu Shizhen rarely see each other and have hardly met in the past three years. The main reason is that both of them are very busy. However, whenever Gu Shizhen has time, he will go to see Chaoyan. The two will meet briefly and then rush off to do their own things.

The Gu family naturally knew that their son was dating, but they had not met yet. When they found out that their son's partner was a developer of high-speed rail, they said that their son was not worthy of her.

Especially with Gu Yingying's assistance, no one in the Gu family does not have a good impression of Chao Yan.

Not to mention the Chao family, who were grinning from ear to ear every day when they knew Chao Yan's achievements.

Knowing that Chao Yan is working for the country, I feel so proud.

Finally, after Chaoyan developed another mobile phone, he left a few weapon drawings and applied for leave.

The higher-ups approved it very readily.

Because Chaoyan's identity is different now, she is protected by guards.

Chao Yan returned to the military camp, but Chao Huaiyi and the others had gone on a mission and were not at home.

Gu Yingying had already returned to the Gu family.

After waiting for several days, Chao Huaiyi and the others finally came back.

"Sister!" Chao Huaiyi's surprised voice said, "When did you come back?"

"You've only been here for a few days, second brother, you've worked hard," Chao Yan looked at her second brother Chao Huaiyi, who was covered in dust.

"It's not hard, sister. Gu Shizhen is injured," Chao Huaiyi said.

"What! Is it serious?" Chao Yan asked worriedly.

He shook his head and said to Huaiyi, "I don't know. He has been transferred to the capital."

Chao Huaiyi's face looked unhappy. In this mission, Gu Shizhen's team encountered a traitor. He was not with Gu Shizhen and just heard about the situation.

So Chao Yan and Chao Huaiyi hurriedly packed up and prepared to go to the capital.