In the room, Zheng Hai had already completely inspected the suite as a whole, and after confirming that there was no problem, he put away the instruments and equipment in his hand.

Tossing back and forth for more than ten minutes, Xu Chuan looked tired.

Glancing at Zheng Hai, who was sorting out the equipment in his hand, he asked curiously: "Speaking of which, do you all do this when you perform security work abroad?" ”

Zheng Hai thought for a moment and replied with a smile: "This has to depend on the situation, but most of the time it basically doesn't have to be so troublesome." “

"Generally speaking, when people with a level of protection like you go abroad, the places where they stay are specific hotels, and the accommodation situation like yours is more mixed, so it's better to be cautious."

"Anyway, it won't waste much time if you check it more, be careful to sail the 10,000-year-old ship."

In terms of security work, to be honest, there are only a handful of people of this level in the country.

For the most part, this level of personnel is found in groups that can only be imagined but cannot be described.

To be honest, the security work of those people going abroad is actually very good in this day and age.

On the one hand, the motherland has become stronger, and its deterrent power to the outside world is also sufficient.

On the other hand, to put it mildly, the importance of those people is far less high, or rather, for the whole of China, they are not the soul that cannot be lost.

The perfection of the system allows them not to be leaderless even when they encounter these accidents.

In comparison, in the country under their feet, the security of the Great Emperor is really troublesome.

I guess anyone who wants to kill him will be able to circle the earth.

For today's Tsarist Russia, it is probably possible to be without anyone, but if the emperor dies due to an accident, I am afraid that it is not impossible for the split of the former Red Soviet Union to evolve again.

As for the group of scientists and scholars, there is such a level of security, probably going back decades?

In contrast, this kind of scientist or scholar's visit abroad actually puts more pressure on security work.

Especially for the person in front of him, there are probably as many people who want to kill him as there are people who want to kill the emperor.

Especially for the country opposite his feet, if he wants to kill him, he may be able to go around the equator.

So it's always good to be a little more cautious.

After all, for the academic community of Huaguo, and even for the whole country, this person in front of him is definitely the real soul figure.

Xu Chuan nodded, a little hesitant, "If that's the case, is it really okay to hand over the security work to the Alpha team as a whole?" ”

Zheng Hai said with a smile: "Don't worry, although the overall security work is planned by the Tsarist side, our people also participate in the security work plan." And the core personal security is also our own people, so we don't have to worry too much about this. ”

After a pause, he continued, "But relatively speaking, I still recommend that you don't run around, if there is a need. For example, if you want to go out to a certain scenic spot or something, it is better to say hello in advance, so that we can also arrange personnel to check. ”

Xu Chuan smiled and said, "This is not true, there are no must-see attractions in St. Petersburg, compared to going outside to see the scenery or something, I am still more willing to communicate with other mathematicians." ”

The quadrennial International Congress of Mathematics is the largest conference in mathematics, and mathematicians from all over the world, even a college student or graduate student, can request a 10 or 20 minute presentation time on this stage to present themselves.

It was obvious that communicating with other mathematicians was more attractive to him than the landscapes.

The scenery could not bring him much inspiration and ideas for moving forward academically, but communicating with these mathematicians could bring him a lot of ideas.

Especially those top mathematicians, they always have knowledge and ideas in their minds that they don't have, and one of them may be able to take another step forward on the road of mathematics.

The deeper he went into the ocean of mathematics, the more Xu Chuan felt the depth and breadth of this sea.

Personal ideas and abilities are just one of them, and if you want to find those new continents hidden in the mist, you need to constantly expand your horizons.

In particular, the exchange of 'materials' with other peers on this sea is even more important.

It's like you're navigating a maze with useful information that saves you a lot of time.

This is the main reason why he is willing to take some risks to attend this international congress of mathematicians.

Because he hopes to go one step further on the road of mathematics.

Although, for others, he has stood at the top.

After simply resting in the hotel room, Xu Chuan changed his clothes and went downstairs to have dinner.

In the elevator and passage of the hotel, he met many scholars, and after recognizing him, they took the initiative to greet him.

Although the International Congress of Mathematics will not start until the day after tomorrow, the Imperial Hotel in Tarun is already full of scholars from all over the world.

There are not only mathematicians, but also quite a few physicists.

Compared with mathematicians, these physicists mainly came to Xu Chuan, or the report of the Young-Mills mass gap paper.

The importance of the Yang-Mills existential and mass gap problem in the physics community is self-evident, and it is the cornerstone of the grand unification theory.

Today, the first half of the question has been peer-reviewed and officially published in the Annals of Mathematics.

The second half was also published by the same person on the ARXIV preprint website, and his presentation was also presented at this year's International Congress of Mathematics.

Therefore, many physicists have come to participate in this grand event of mathematics at their own expense.

After all, whether the mass gap is correct or not is related to the subsequent unified theory of strong electricity.

Although the closest to the unified theory of strong electricity is undoubtedly the one who solved the Yang-Mills existential and mass gap problem, for many physicists, no one wants to give up early.

After all, this is the crown of theoretical physics in the 21st century, and if anyone can complete its unification, its status and honor will not be comparable to that of Einstein in the 20th century, but it will be comparable to that of Albert in the late 19th century.

This is not only something that Einstein did not do, but also the direction to the Holy Grail of Great Unification, the cornerstone of the entire edifice of physics!

In the hotel's restaurant, just as Xu Chuan was picking up the buffet provided by the hotel with a plate, a greeting with these doubts passed in his ears.

"Professor Xu?"

Some familiar voices came from the side, and Xu Chuan, who was holding the plate clip, subconsciously turned his head to look over.

He was greeted by two middle-aged young men, one with short black hair and a pair of black-rimmed glasses, and the other with long brown wavy hair and a thin woollen sweater.

The eyes of the three of them met, Xu Chuan was slightly stunned, then a smile appeared on his face, and he responded: "Schultz? Tao Zhexuan? I didn't expect you to arrive, I thought you would come tomorrow. ”

The two people who greeted him were the two most famous scholars in the young generation of mathematics besides him, Tao Zhexuan and Peter Schultz.

The former is known in the mathematical community as the 'all-round mathematician' of the new century after Poincaré, while the latter is known as the 'successor' of Pope Grothendieck, which is enough to show the status of the two in the mathematical community.

For Xu Chuan, these two are enough to be called old friends.

He met the two of them when he first went to Princeton for academic exchanges and presentations in the past five years, and he has been in contact by phone or email for the rest of the year, so it can be said that he is quite familiar.

After confirming that the figure in front of him was not mistaken, Schultz, who was more cheerful, walked over quickly, and wanted to hug him warmly, but after finding that it was inconvenient for Xu Chuan to hold the dinner plate in his hand, he could only hammer his shoulder hard.

"Hahaha, I really didn't admit my mistake! It's really you! Schultz laughed and said, "That guy Tao also said that you couldn't have appeared here so early, it seems that he guessed wrong!" ”

On the side, Tao Zhexuan also walked over quickly, with a hint of surprise in his black pupils with glasses, and after saying hello to Xu Chuan with a smile, he said: "I really didn't expect you to come over early, I originally thought I wouldn't be able to see you until the opening ceremony or the last day." ”

Xu Chuan smiled and said, "For the quadrennial event, it's normal to come over in advance to make preparations. ”

After a slight pause, he continued: "And many mathematicians on the Tsarist side are very good, and I am going to talk to them." ”

Hearing this, Schultz seemed to think of something, and said with a smile: "If you are going to go to Perelman, I suggest that you give up this idea." ”

Xu Chuan glanced at him curiously and asked, "Why?" ”

Hearing this, Schultz shrugged his shoulders and said, "You must be the only one who has this kind of thought, and during this kind of conference, that weirdo probably won't meet anyone who visits." ”

After a pause, he continued a little helplessly: "Of course, the main thing is that I tried to find him yesterday, but his mother told me that he went swimming in search of inspiration, and then I waited there for an hour and didn't wait for him. ”

If there are 'ascetics' in mathematics today, Perelman, who proved one of the seven millennial problems, is definitely the one who meets the standard.

Proof of Poincaré's conjecture soon made him famous in mathematics and even in academia, but the mathematician was a man of little interest in exposing himself to the public.

Not only does he dislike dealing with the media, but he also dismisses interviews with prestigious magazines like Nature, Science, and Time.

In addition, he turned down the Fields Medal, a million dollars from the Clay Institute of Mathematics, and even quit his job and went into seclusion because of the frequent interruptions he had made after becoming famous.

It is said that the mathematical community in the United States admired this genius very much, but he refused offers from prestigious institutions such as Stanford University and the Institute for Advanced Study in Princeton, preferring to "look for mushrooms in the forests near St. Petersburg".

Therefore, it is not a bit difficult to visit this mathematician with a 'withdrawn' and 'social phobia' personality, especially during a grand event such as the International Congress of Mathematicians.

Hearing Schultz's words, Xu Chuan was slightly stunned for a moment, and then said with a somewhat strange expression: "But I sent him an email a few days ago, saying that I would visit him during the International Congress of Mathematicians, and he agreed?" ”

"Huh?"

Hearing this, Schultz froze for a moment.

After being stunned for a while, he looked at Xu Chuan with puzzled eyes, and asked hesitantly, "Are you sure?" ”

Xu Chuan thought for a while and said, "I think I can still distinguish the meaning of agreement and refusal." ”

The corners of Schultz's mouth twitched, but he quickly adjusted, quickly wrapped himself around Xu Chuan, and said, "When are you going over, please be sure to take me with you!" ”

He must go over and ask the 'bad old man' why he refused his visit!

Xu Chuan smiled and teased: "I'd better ask his opinion, if I bring you, I will let me eat closed-door soup, I still don't bring it." ”

Hearing this, the corners of Schultz's mouth couldn't help but move again.

MMP！

That sounds really annoying!

On the side, Tao Zhexuan watched the two of them fighting, and also smiled and teased: "Maybe compared to Xu, you are still one millennial problem behind, if you can solve the remaining three millennial problems, Perelman will not refuse your visit." ”

Hearing this, Schultz couldn't help but shake his head and muttered: "If you want to say that, I'm not missing one, but three." ”

"God knows how this perverted guy did it, and it's unimaginable that one person has solved three millennial problems one after another."