Professor Zhang, who is only in his forties, has resumed the college entrance examination this year. Being able to sit on the throne of the head of the Department of the First Mathematics Department of China at this age has proved his excellence.

Professor Zhang was admitted to the Department of Mathematics as an elementary school teacher and quickly became immersed in the wonderful country of mathematics. After entering the Beijing University, he began research on finite groups and gained widespread attention from the international mathematics community because of solving an international mathematical problem.

Recalling those hard days made him feel emotional and proud. At that time, there was no computer search system today. If you want to search for the latest research results related to that problem, you can only search through one journal after another. During that time, he read all the Algebra magazines for nearly twenty years. This magazine published two books a month, and in twenty years there were almost five hundred books. This is just one of his reference materials. He found clues to solve this problem from these magazines that were stacked higher than him.

Although he has become the head of the Department of Mathematics of the Jingshi University and has become much busy with work and his research on finite groups has reached a critical stage, he still has not given up his habit of reading journals.

"The latest issue of the "Mathematics Annual" has been sent!" Professor Zhang sighed. With the strength of the strongest mathematics department in the country at Peking University, he has only published two articles so far, one was eighteen years ago, and the other was two years ago. Although there have been some improvement in recent years, when he thinks of the good seedlings going to the Department of Finance, Professor Zhang is worried about the future of the Department of Mathematics.

Well? This name seems to be Chinese! Have mathematicians in the Chinese circle achieved remarkable results recently? Professor Zhang quickly flipped into Lu Qiujian's paper and scanned the signature part; hey, it's from Princeton, I thought it was from that university in China!

Hey, Lv-QiuJian? This name seems to be familiar! Professor Zhang immediately put down his paper and turned over the documents in the file cabinet. He said that he could find a place for the mathematical data no matter how messed he placed it. However, although this kind of administrative data was neatly sorted by the assistant, he still couldn't figure it out after searching for it for a long time.

I immediately got up and walked out to the room and called my assistant, "Hurry up, help me check the information! What's the name of the student we exchanged to Princeton this year!"

"No need to check, I remember it should be called Lu Qiujian!" The assistant remembered the mathematical formulas clearly. He remembered these things without remembering them all. He couldn't help but complain for a while. He offended many people for the sake of this quota.

"Are you sure?" Professor Zhang showed a hint of joy, and then shook his head after twitching twice, "You have to be careful, you can find his files and show me!"

"What's wrong?" The assistant walked towards the cabinet where the information was stored in confusion.

"It's a good thing, it's a good thing!" Professor Zhang looked around, and wanted to go back to read Lu Qiujian's paper, and then he was afraid that he would not be able to see Lu Qiujian's archives as soon as possible. He couldn't help but urge, "You should hurry up! It takes so long to find a material? How do you do your daily work!"

"It's good now, it's good now!" The assistant responded with a smile, while secretly complaining that such information has always been placed deep in the cabinet, so how can a document like "Investigation on the Housing Situation of Faculty and Staff in the Department" be important? What happened to Professor Zhang today? He was not so active when he was dividing houses before!

"Oh! Look for it quickly, if you find it, where will I send it to me immediately!" Professor Zhang finally couldn't help but go back to the office and looked at Lu Qiujian's paper carefully. Xiao Liu is usually very quick, but he searched for information today but couldn't find it after three minutes!

"What a good article! What a good article!" Professor Zhang knocked on the table rhythmically, and praised while reading Lu Qiujian's paper. He was still young and strong. In addition to his own limited group problems, he followed other cutting-edge research and quickly saw that Lu Qiujian's article was very good.

Hey, I remember that the partial differential teacher in the college was Professor Ren. Professor Ren’s research direction seems to be different from the problems involved in this paper? Professor Ren’s main research is... and the problem solved in this article is...

"Professor Zhang, the information has been found!" The assistant's words interrupted his thoughts. He looked up and saw a file bag handed over by the assistant.

"Will you wait a while? Didn't you see me thinking about the problem?" Professor Zhang was very angry just after he got a clue but was interrupted by someone else.

I opened the file bag in two seconds and took out Lu Qiujian's file, which clearly stated that I went to Princeton University in the United States for a one-year exchange study abroad this semester.

Didn’t you just ask me to send it as soon as I found the information? The assistant didn’t dare to argue, so he had to stand there with grievance.

It's him! Professor Zhang saw his assistant still beside him and ordered, "Go and call Professor Ren and ask him to come to me immediately!"

It's right again! The assistant is almost allergic to these two words. When he was about to go out, he saw Professor Zhang wave his hand again and pick up the phone, "Forget it, I can't find any information. I don't know when I will wait for the call! I'd better do it, you go out, remember to bring the door with me!"

You officials are so bad! The assistant is in tears. The good image he has worked hard to establish in front of Professor Zhang is ruined today!

"Haha, Professor Ren! What are you doing?... Oh, correct the paper!... Let's put the work in your hands first! Come to me, I'll show you a paper!" Professor Zhang endured the excitement and sent an invitation.

There was originally an attempt to shirk it, but seeing that Professor Zhang was determined, he put down his paper and rushed over. When he entered the door, he happened to see Professor Zhang holding a magazine in his hand and paced around the office.

"Ye! Who has published the paper again?" Professor Ren walked over with a smile. This kid came to show me his achievements again?

"Hmm? Ann.-of-Math!!" Professor Ren was shocked when he saw the cover of the magazine and couldn't help reading the English abbreviation of "Mathematics Annual", "Lao Zhang! You have published an article on it! It's amazing!"

"It's not me! It's a student in our school!" Professor Zhang handed over the magazine. Hey, this article is good, but the word Princeton is a bit awkward. It would be great if it was replaced by Peking University!

"Oh, which exchange student is he who went to Princeton!" Professor Ren still has an impression of the name Lu Qiujian, "I can publish papers in just a few months. Is Princeton so powerful?" No, I will find an opportunity to go over and communicate!
Chapter completed!