Frankfurt, Hesse, Germany.

Air France's flight from Frankfurt Airport only has one line, which is from Paris to Frankfurt. In April 2021, an Air France red-eye cargo plane crashed when it landed in Frankfurt.

Su Fei and the other two arrived in Paris first and went to Air France headquarters to learn about the relevant situation. The next day, they set off for Frankfurt.

A plane that was broken into pieces was re-connected by Easa's investigators using metal skeletons to form a complete one. Easa's senior investigator in charge of the accident was still an old acquaintance.

Gao Yun: "The current investigation has reached the final explosion-equivalent experiment. It is suspected that the cargo in the cargo hold had a chemical reaction, causing the explosion and fire. The question is why the explosion occurred and what is the critical line for the Boeing 747-8 cargo plane's explosion-proof critical line."

Everyone nodded, and Old Joseph smiled and said, "You guys fight very quickly this time."

Gao Yun also smiled: "After all, it's not that bad, isn't it? If it hit a mountain and hit a piece like Martha Airlines 123 last year, I believe me, my friend, I don't want to fight it at all."

Everyone burst into laughter.

After arriving in Frankfurt, the three of them quickly got into work.

Old Joseph: "I don't know how Reid and Fu are doing. To be honest, this is the first time they are not here to commission a job, and I'm really not used to it."

Su Fei also scratched his head: "I also feel something strange. Without Rip in the back, I feel uncomfortable all over."

lina came over with a cup of coffee: "Maybe I can bring you good news."

"What?"

lina blinked: "The redecoration of the uaag headquarters has been completed. When we finish this work, we will be able to enjoy a new office."

Su Fei and Joseph the Old: "…"

Old Joseph muttered: "This is really not good news!"

In addition to lina, after the renovation of the uaag headquarters was completed, the first person to know was not old Joseph and Su Fei, but Fucheng.

Lina is not in the country, and someone needs to go to the on-site inspection after the decoration. She asked Fucheng.

After signing his name on the acceptance form, Fucheng took another taxi to COMAC factory in the afternoon.

Put on white experimental clothes, put on glue gloves, and Fucheng entered the laboratory.

The takeoff status of the new wing shape is being simulated on four computers. Zhuo Huan and Chief Designer Wu are standing on both sides of the computer screen. It seems that they have not had a rest for a long time. Zhuo Huan's eyes are tired, but his brows are frowning and his lips are tightly pursed. There is no need for real test flights. Just by simulating on the computer, the result of this wing shape transformation made them very dissatisfied.

Chief Designer Wu: "If you want to have a high lift-to-resistance ratio for high-speed cruising, you must first ensure a sufficient and safe stall margin. The lift is proportional to the amount of ring formed by the airfoil. If you want to change the effective value of the ring, you must use the highly curved medium arc under the premise of meeting the Kuta conditions..."

After he finished speaking, a few seconds later, Zhuo Huan: "Where are you using front and rear edge loading at the same time?"

Wu Hui was stunned: "This is completely different from our initial design concept, it is to overthrow it and start over again."

Zhuo Huan looked up at Fucheng: "What do you think? You have experience in driving with Mai Fei f475neo."

Everyone turned their heads to look at Fucheng.

Fucheng glanced at Zhuo Huan and replied: "Mai Fei's new neo model does not adopt the front and rear edge loading structure, but according to the two-dimensional experimental results of the wing profile," he paused. Fucheng recalled the lift model of the new Mai Fei model that he and Zhuo Huan spent nearly two months studying when he was in Los Angeles. He pondered for a moment and said: "I think it is feasible. What do you think, Teacher Zhuo?"

Zhuo Huan looked at him with a long look. After a few seconds, he turned to the designers of COMAC, "Re-adopt the front and rear edge loading device and conduct the experiment."

"yes."

In the entire COMAC design laboratory, Zhuo Huan is the only one with the world's most advanced large wide-body aircraft design experience.

Maifei f485 is one of the best wide-body passenger aircraft in the aviation industry today.

When he first came to the COMAC factory, no one knew that Zhuo Huan had spent half a month reading all the design drawings almost without sleep. COMAC gave this person great trust. When Zhuo Huan was not a designer of COMAC, he gave the drawings to him without reservation. Zhuo Huan also gave the corresponding answer.

Most of the design and system of cr939 are not problematic. Although it does not meet the standards of the world's top wide-body passenger aircraft, it can at least barely get close to the Boeing 777 series. If there must be improvements, which can truly reduce flight costs and become the secret weapon of this aircraft, is the new wing shape.

After the third test flight, at Zhuo Huan's request, Fucheng also joined the design team because he was the only two people in the audience who had seen Mai Fei f475neo and had also driven it himself.

At this point, Zhuo Huan suddenly decided to completely replace the basic model of the wing, which is equivalent to starting over and a severe test for the entire designer team. However, Chief Designer Wu did not object, and more than a thousand designers from COMAC did not refuse.

Just like screws embedded in assembly lines, everyone is silently doing their jobs. Working overtime has become the most common thing.

The sensing glass door opened to both sides, Fu Cheng rubbed his sore wrists, walked out of the laboratory and towards the catering bar.

He bought a piece of bread in the vending machine, walked to the chair by the window and sat down, biting the bread while looking at his phone. He was looking at his cousin's Moments posting yesterday when he went to Paris to travel. Suddenly, the phone vibrated slightly, and Fucheng clicked on the message, and was silent for a moment without replying.

But for a long time, several more experimenters came out and had a meal together.

One of the young experimenters saw Fucheng and waved to him. The few of them walked to Fucheng together and sat down.

"You're just eating this little thing, Major Fu?"

Fu Cheng smiled and said, "Well, I have a little appetite."

Putting the phone upside down on the table, Fucheng stopped looking at the phone, and the few people on the dining table started chatting.

After leaving the laboratory, these young experimenters would also say some family matters. Sometimes they would complain that the simple meals made at the restaurant bar today were too unpalatable and the fishy smell was too strong; sometimes they would complain that today's experimental data exceeded the critical point and had to be recalculated.

Fucheng listened to them in a mess and ate bread slowly.

One of the experimenters turned his head to look at him: "Major Fu, your phone has vibrated several times, don't you need to check it out?"

Fucheng paused and said, "It was probably an app advertisement."

The experimenters nodded and did not ask any more questions.

After a minute, Fucheng had just finished eating the bread when his phone suddenly started to shake violently. He pursed his lips and turned on the phone. The words "Su Qiao" flashed on the screen. After looking at it for a second, Fucheng stood up and said, "I'll go and answer the phone."

After packing up the plastic bags on the table, Fucheng answered the phone while walking towards the balcony.

When Zhuo Huan and Chief Designer Wu came out of the laboratory, they saw Fu Cheng's back as he walked away.

Zhuo Huan looked up at Fucheng's back. Chief Designer Wu had no airs at all and sat down directly in the seat where Fucheng had just sat. Several experimenters and experimenters immediately stood up and shouted nervously: "Hello Teacher Wu!"

Wu Hui smiled and waved his hand: "Everyone is sitting down, not in the laboratory, there are not so many rules, so I'll have a meal. I'm the Major Fucheng just now, can I finish eating so soon?"

The experimenter sitting next to Wu Hui nodded: "Major Fu just ate a bun, which is much faster than us."

Wu Hui: "Oh, what is he doing? That's not the direction of the laboratory."

A younger experimenter smiled and said, "It seems like he's going to answer the call from his girlfriend."

Wu Hui widened his eyes: "Does Xiaofu have a girlfriend?"

An experimenter hurriedly said, "I just heard Major Fu answering the phone, it was a woman's voice. So... it should be his girlfriend, right?"

Wu Hui sighed: "It's so good to be young."

Zhuo Huan walked past the table with an expressionless face. He walked to the vending machine, stood and watched for a long time before buying a bottle of Coke.

...

These experimenters are right. Fucheng did answer a call from a woman, which was Su Qiao's.

Since sending Su Qiao home at that class reunion and rejecting her confession, Fu Cheng stopped contacting her. However, the WeChat message could be regarded as not seeing it, but the phone could not be answered. After answering the phone, learning about the other party's intentions, Fu Cheng silently said, "It doesn't matter, it's just a meal."

The woman's pretty voice seemed even softer on the phone: "How can that be? I haven't invited you another meal when you invited me to the French food you had. Fucheng, you promised me before and asked me to treat you too. Could it be that because I said those words to you last week, you would never want to see me again?"

"……No."

"Then let me treat you."

"It's really okay."

Su Qiao laughed: "Okay, I'll tell you the truth. I have a different purpose in treating you to dinner."

Fucheng was slightly stunned.

Before he could speak, Su Qiao continued, "I'm going to move this week, so I want to ask you to help. Just this weekend, I'm going to move, and I've called a truck, but there are still many things. I've been looking for others, but they all happen to have something to do. Fucheng, can you help me move? I'll treat you to dinner, please, please, please."

After a long silence, Fucheng said, "Okay."

***

Su Qiao and Zhuo Huan live in the same building.

Fucheng didn't expect that he would enter this building again to help people move.

Su Qiao lives on the seventh floor, which is more than half smaller than Zhuo Huan's house. As soon as he entered the house, his things were packed with cardboard boxes. But there were still many fine debris that had not been packed. After Fucheng helped to sort out two more large boxes, it was already eleven o'clock noon.

Su Qiao rubbed her shoulders: "Okay, thank you, Fucheng. I'll just wait for the afternoon to drag all these things away."

Fucheng shook his head: "It's okay."

Su Qiao looked into his eyes, and after a while, she smiled and said, "Let's go, I'll invite you to dinner. I've set a seat and it's nearby."

Su Qiaoding’s restaurant is diagonally opposite the community, and is a Western restaurant.

The melodious and soothing piano music flows slowly in the quiet restaurant, with each seat being separated by a distance, ensuring a relative **. There are not many people in the restaurant, and it is very quiet. After the two of them sat down, they ordered the seasonal food according to the menu of the day, and then started talking and chatting.

The main thing is Su Qiao's saying.

It seemed as if it had become the default habit of getting along with the two. From the first meeting ten years ago to the present, Fucheng always listened to the one, and the girl was muttering in his ears. Ten years ago, the girl finished a lot of words and got a gentle "um" from the boy, she would pursed her mouth and complain: "Fucheng, have you listened to me? Do you don't like me anymore?"

However, now, Fucheng still looked so gentle and peaceful, but Su Qiao could no longer ask this sentence.

Looking at the handsome young man opposite the table, Su Qiao slowly pinched the goblet containing red wine, and a deep light flashed in her eyes. When Fu Cheng turned his gaze back to her from the window, she immediately covered her lips and chuckled, her tone helpless and sad, as if she was acting coquettish: "Why are you not curious about me at all? Don't you want to ask, why do I suddenly want to move?"

Silenced, Fucheng: "Why?"

The beautiful woman sighed heavily: "After divorce, life is not easy. Living in such a big house is very expensive."

Fucheng: "…Hmm."

Su Qiao: "..."
To be continued...