After staying in Paris for nearly a week, Qiao Yu returned to the capital.

He said he was traveling abroad, but excluding the journey from the airport to the hotel, Qiao Yu actually only spent more than three hours outside in Paris.

The closing ceremony of the conference is on the morning of the last day.

After having dinner at the hotel at noon, Tian Yanzhen probably took Qiao Yu out for a walk with many professors, probably considering that Qiao Yu had finally gone abroad once and had never gone out for sightseeing.

Obviously this was not the first time for the professors to come to Paris. There was no need to look for directions. They took Qiao Yu directly along the Avenue Pigalle in the 8th district of Paris outside the hotel and walked to the Champs Elysées.

Knowing that Qiao Yu wanted to buy a gift for her mother, she stayed for some time on the Champs Elysées.

After choosing and choosing, I finally bought two watches, planning to give one to Qiao Xi and one to Xia Keke.

Qiao Yu originally wanted to buy a gift for Mr. Yuan, but was persuaded by Tian Yanzhen.

It is enough to say that after his paper is published and Ann.Math sends him a copy of the sample journal, he will give it to Mr. Yuan.

Qiao Yu had nothing to do about this.

Because although the gift was bought by him, it was given by Tian Yanzhen.

After finishing the purchase, under the leadership of the professors, we walked onto Avenue Montaigne, passed by the Seine River, looked at the Eiffel Tower from a distance, and then returned to the hotel.

Yes, I didn’t even go to take a closer look. Because according to my professor, someone had their phone taken away while taking pictures here. Out of distrust of the local security, everyone’s opinion was just to take a look.

To be honest, this journey was indeed very disenchanting, because the free air by the river was not only not sweet enough, but also smelled bad.

In fact, before coming to Paris, Qiao Yu had read some travel bloggers' strategies and thoughts, and always felt that they were a bit exaggerated. Paris is the capital of a developed country, so it was unlikely that there would be unpleasant things floating in the air. smell.

Not to mention that last year, a large amount of money was spent to regulate the Seine River because of a grand event. But now it seems that the large amount of money was probably wasted.

I never imagined that I could be so free here...

People can actually enjoy the right to freedom of defecation anywhere. Apart from being amazed, Qiao Yu only felt that he had become more knowledgeable.

On the way back to the hotel, Qiao Yu asked in surprise: "Can't they make public toilets free?"

The accompanying professor jokingly said: "Actually, if you think about it this way, maybe this is a means of self-protection. Then the next time the Germans come with tanks, they may just go around Paris because they think it is too disgusting. Pass Paris and choose a southern route, such as going directly through the Alps and marching into Italy."

Qiao Yu was dumbfounded after hearing this sentence, and also opened up the conversation box of the accompanying professors.

What enters Portugal through Spain, opens up and controls the Atlantic coast, and ensures the security of maritime supply lines; what strengthens control over Belgium and the Netherlands, stabilizes positions in Western Europe, and then points to the English Channel...

A group of mathematicians instantly transformed into strategists and helped Lao De with suggestions, giving more than a dozen strategic routes along the way.

The most frightening thing is that they can analyze it clearly and explain all the advantages and disadvantages of the route... Well, the starting point is generals per capita.

This gave Qiao Yu the feeling that if he could not learn geography well, he was not worthy of learning mathematics.

The normally gentle professors turned out to be very eloquent when discussing this matter, which only made Qiao Yu feel even more embarrassed.

It seems that after returning home, he not only has to cram in mathematics knowledge, but also has to cram in detailed geography of various countries, as well as various advanced war games knowledge, otherwise he will be embarrassed to hang out in the mathematics field of Yanbei University. After returning to school, the first

One thing is to move.

In fact, renovations had already started upstairs before he went to Paris to attend the algebraic geometry conference.

He also specifically asked the decoration master about the decoration plan.

The main ones are the waterproofing of the roof, renovation of the toilet, and the addition of two walls.

When he came back, everything had been decorated and everything in the room had been moved upstairs.

As for his previous cabin, it became a utility room again.

After coming back, although Tian Yanzhen was very tired, he still came over and took a walk.

The renovated decoration is pretty good. Although the room is still not big, it is still about 30 to 40 square meters. It is already a small suite with all the necessary equipment.

Entering the door, there is a corridor that leads directly to the toilet at the back. A door is opened in the wall of the corridor, and you enter a small study room of more than ten square meters. There is also a door in the study room that leads to the bedroom at the back.

It is much larger than the small room downstairs. The most important thing is that it fully meets Mr. Yuan's requirements. There is a toilet, the study is separated from the bedroom, and it is transparent from north to south. The premise is that the door connecting the study to the bedroom is open.

The most important thing is that the lighting on the third floor is much better. Everywhere in the room is bright in the morning. Moreover, the materials used are very good, and the windows have been opened for ventilation for a few days, so there is no peculiar smell in the room.

Let's put it this way, the living conditions are indeed enough to beat many PhD students from Yanbei University.

After all, the dormitory space at Yanbei University is really tight now. Many years ago, it no longer provided dormitories for associate and master's degree students. Most PhD students on the old campus can only live in two-person rooms. If you have special needs and want to live in a single room, you need to

Apply.

"Are you satisfied?" Tian Yanzhen asked.

"Actually, I'm quite satisfied downstairs, let alone here." Qiao Yu replied immediately. Well, anyway, changing dormitories was not what he asked for.

It's okay to be arrogant due to favor, but Qiao Yu doesn't think it's worthwhile to use it for temporary residence.

Although he is the beneficiary, the request was made by Grandpa Shi.

"As long as you are satisfied, if you are not satisfied, I will be scolded again." Tian Yanzhen said with a smile and left.

Qiao Yu was not in a hurry to rest. Instead, he went to the express delivery station and took back the small banner he had specially customized for viewing and motivation on a certain treasure, and hung it on the wall next to the table in the study room.

The wall facing the study door is very eye-catching.

As soon as you walk into the study room, you can see this red flag and the ten characters "Read for the rise of Chinese mathematics!", and that feeling comes over you immediately.

At least Qiao Yu was satisfied with it.

He immediately took out his mobile phone and took a picture of the room as a whole. He planned to post it on Weibo, but gave up before Weibo was opened. Because Qiao Yu considered that this time point was not suitable.

Because he is going to attend IMO in July, and the math experts at the conference have said that he may be complained about by others if he goes to IMO. So it is best to keep a low profile at this time.

However, he couldn't help but send a photo to Qiao Xi on WeChat.

"Look, Mom, at the request of Grandpa Shi and under the auspices of Director Tian, ​​I moved after I came back. Now I am also a man who owns an apartment in the capital."

"Hey, that's good. That flag on the wall reading for the rise of Chinese mathematics was made by the instructor?"

Sure enough, that flag was very eye-catching and impossible to ignore.

Qiao Yu replied with a message: "Haha, I ordered it myself on a certain treasure. It's very cheap, more than 80 yuan. In the future, when I become famous, this place will be the former residence of the great mathematician Qiao Yu. I will be here then. If you sign a flag, it will have collectible value, and you might even be able to earn tens or millions by auctioning it off!"

"If you want to brag, be more generous. Why are you so reserved in your dreams? A million is less. Last time I read on the Internet, it was said that Einstein's manuscript was sold for more than 10 million euros, so your flag must be worth at least 20 million. EUR!"

"Mom, excuse me! Let me take a nap first and have a bolder dream!" "Go! Have a good rest."

Qiao Yu put away his phone and sighed, Qiao Xi always had ten thousand ways to do it, which made him feel uninterested.

Forget it, let's rest first.

In fact, whether this flag will be really valuable in the future is another matter, but it definitely hit the soft spot of the two big guys.

Especially when Yuan Zhengxin came to Qiao Yu's place to see the new apartment the next day, he stood under that flag for a long time.

He also reached out and touched the material of the flag. Qiao Yu even felt that the old man's eyes were a little wet.

This made Qiao Yu feel a little nervous for a while, wondering if he was going too far.

Fortunately, after the old man turned around, he just patted him on the shoulder and said with a slightly choked tone: "Okay! Just have this ambition. This is the ambition of several generations!"

Well, it can be seen that the old man is still very satisfied.

As long as you are satisfied, the more than eighty yuan will not be wasted.

The old man was invited to sit down in the room. Unexpectedly, the old man also brought a newspaper and handed it to Qiao Yu.

"Have you ever received an interview in France?"

"Ah, yes, a reporter named Zhang interviewed me."

"Well, I've already seen it in the newspaper. You boy, you really know how to talk." The old man said with emotion. Qiao Yu took the newspaper, and sure enough, his interview took up a large page.

Qiao Yu also probably knew why Mr. Yuan said he could talk. The reporter wrote out the last question that made him disgusted.

But the meaning is actually very positive.

"... Just like Qiao Yu said, we don't need to worry about topics like the so-called Great Reconciliation of the Century. The future of the Chinese mathematics community as a whole will be bright..."

Well, at least the reporter didn't misinterpret his meaning, and Qiao Yu felt very relieved. So after reading the newspaper, Qiao Yu raised his head with a sunny smile still on his face.

"It's not me who can speak. I really think so, Grandpa, isn't it right?" It was obvious that the old man had no sullen mood and kept a warm smile. "Yes, everything you said is right."

Just like last time, Mr. Yuan didn't stay long. After confirming that Qiao Yu's accommodation environment had indeed been qualitatively improved, he chatted with Qiao Yu for a few words about his experience in Paris this time before heading back.

Before leaving, the old man asked Qiao Yu a question that made him feel ashamed. "By the way, the day after tomorrow is Children's Day. Do you have any idea how to spend it?" "Well, grandpa, I am sixteen years old, and I can still live as a child." Festival?"

"Why can't you pass? Article 1 of the United Nations Convention on the Rights of the Child stipulates that a child refers to anyone under the age of 18, unless the age of majority under the applicable laws is less than 18 years old. Children are all children until they reach adulthood. What, you are an adult?"

Mr. Yuan said loudly.

Qiao Yu immediately accepted this explanation and asked proactively: "How about we go to a park? One where you can ride a roller coaster? I didn't go there much when I was a kid."

"Okay, I'll go with you! But you're not allowed to ride the roller coaster. It's too dangerous. You'll be allowed to ride on other less dangerous rides."

Well, Qiao Yu felt that if he was in high school and had to write an essay after this holiday, he would have a lot of material.

The title is "My Grandfather, an Academician, Accompanying Me in the Park." If this is an essay competition and it doesn't win an award, it's definitely because the judges are ignorant.

On the day of Children's Day, Mr. Yuan actually took a whole day and took Qiao Yu to Happy Valley in the capital with the staff.

Both meals were eaten out.

Although this year's Children's Day happened to be on a Sunday, it still left Mr. Yuan and his entourage speechless.

Mr. Yuan was recognized several times and happily took photos with several children.

As for Qiao Yu, he didn't bother to care what others thought. Anyway, he was really happy on this Children's Day.

He basically played everything in Happy Valley except the roller coaster.

However, the weather in Beijing is nice today, and Labor Day falls on the weekend, so the park is crowded with people.
To be continued...