In the following time, Pang Xuelin's days became full and busy again.

In addition to cooperating with Changqing Li's project team to write papers on the preparation and characterization of high-purity electronic-grade single-walled carbon nanotubes, the rest of the work is to give lectures to undergraduates and Ponzi geometry seminars, and to organize and compile Ponzi geometry textbooks by the way.

The matter of compiling textbooks has long been decided, and Ponzi geometry belongs to a new branch of mathematics pioneered by Pang Xuelin, so compiling textbooks is naturally the proper meaning.

In addition, Dad's Xinkai Material Technology Co., Ltd. also reached an agreement with the School of Materials Engineering of Jiangcheng University.

Xinkai invested 100 million RMB, and the School of Materials Engineering of Jiangcheng University invested 20 million yuan to support the research of carbon nanotube CMOS, high-strength carbon nanotube materials and high-purity graphene in the School of Materials Engineering.

In the end, the patent income was obtained, Xinkai Company accounted for 40%, Pang Xuelin accounted for 30%, and the remaining 30% was from the School of Materials Engineering.

In this regard, neither Xu Xingguo nor Li Changqing has any objections.

After all, all the experimental ideas of these projects come from Pang Xuelin, and the School of Materials Engineering only provides experimental equipment and experimental dogs, at best, plus Xu Xingguo and Li Changqing, the two big bulls, can get so many benefits, which is already very good.

In addition, after a month of busyness, the paper on the preparation and characterization of high-purity electronic-grade single-walled carbon nanotubes was officially released, with Pang Xuelin as the corresponding author, an associate professor from Li Changqing's laboratory as the first author, and two other experimental dogs participating in the experiment as the second and third authors.

Pang Xuelin originally wanted to add Li Changqing's name to the list of co-corresponding authors, but was finally rejected by Li Changqing.

According to Li Changqing, in addition to providing laboratories and experimental dogs for this project, Pang Xuelin completed both the experimental ideas and the overall control of the experiment, and he didn't need to touch this kind of light.

Pang Xuelin had no choice but to give up.

After the paper was completed, they deliberated and finally chose the main journal of Nature.

At present, the purity of carbon nanotubes prepared by the world's top material research institutions is about 95%, and the 99.99999% supermaterials prepared by Pang Xuelin can be regarded as a breakthrough.

The time has imperceptibly entered April.

This morning, Pang Xuelin had just finished a class and returned to his office, Qi Xin followed him and walked in and put a document in front of Pang Xuelin.

"Junior brother, help sign this document."

"Exit report? Are you leaving? ”

Pang Xuelin was slightly stunned, and suddenly looked up at Qi Xin in surprise.

Qi Xin smiled: "Yes, I have already received a PhD offer from Princeton, and I am going to study for a PhD in the Department of Economics at Princeton, and now that the tutor has been contacted, I have to prepare for it in the next few months, and I will fly to the United States in June." ”

"Why?"

Pang Xuelin looked at Qi Xin with blazing eyes.

Qi Xin quietly looked at Pang Xuelin and said with a smile: "I want to improve myself again, in fact, I considered whether to study for a doctorate last year, and I went to take the TOEFL test during the summer vacation, and then temporarily decided to stay in school for some reasons. And I'm 24 years old this year, and if I don't work hard, when I graduate with a doctorate, I may become an old girl that no one wants......"

“……”

Pang Xuelin opened his mouth, but in the end he didn't say anything, and signed his name on Qi Xin's resignation report.

"Junior brother, thank you!"

After getting the resignation report, Qi Xin thanked him, and then turned around and was about to go out.

"Qi Xin ......"

Pang Xuelin said.

"What's wrong?"

Qi Xin stopped and turned to look at Pang Xuelin.

"Would you like to have dinner together in the evening?"

"No, I'm almost done with my resignation, all that's left is your signature, I've booked a train ticket for the afternoon, and I'll go home today."

"That'...... Well......"

Qi Xin smiled, and the moment she turned her head and came out of Pang Xuelin's office, the smile on her face quickly dissipated, and at some point, the girl was already in tears.

……

At noon, Pang Xuelin came out of the office, Qi Xin's workstation, her personal belongings had been completely emptied, and she had already left.

Pang Xuelin only felt as if his heart was suddenly empty, and his original intention of going to the cafeteria to eat was gone, so he just returned to his position in a daze.

In the next few days, Pang Xuelin seemed a little distracted.

No one knocks on the door every morning to ask him to go to the morning workout with him.

No one waits for him to go to the cafeteria to eat with him at noon every day.

Sometimes when he gets off work late, no one will send him a supper.

After Qi Xin left, the school quickly arranged another assistant for him, and this time, at the request of Pang Xuelin, the school arranged a male assistant surnamed Dai, who was only responsible for his own work affairs.

It wasn't until half a month later that Pang Xuelin gradually came out of that state of being unwilling.

There is still no news from "Nature", and Pang Xuelin is not in a hurry.

Papers of this level, from submission to issuance, can be as short as two or three months, or as long as half a year, and there is no news until now.

Time passed day by day, and before I knew it, it was the end of April.

It's about to be May Day, and Pang Xuelin's mood is getting better day by day.

Pang Xuelin has already made an appointment with Yao Bingxia to go out on a self-driving trip on May Day.

For this reason, Pang Xuelin specially asked the school for ten days of vacation.

Yao Bingxia doesn't have to be so troublesome, she has to represent the school to participate in CCTV's May Day party, and she has basically been busy with this in the past few months.

When the party is over, she will completely herd the sheep.

Just go back to school before the final exams.

On the evening of May Day, Pang Xuelin went back to his grandparents' house for a meal, and then waited for the art party to start at eight o'clock.

As a result, after watching it for two hours, only one camera swept to Yao Bingxia, who was dancing with him.

Pang Xuelin felt that Yao Bingxia's efforts were not worth it, but he also understood that this is the case in all walks of life, and Yao Bingxia was able to appear on the stage of CCTV, which was already very successful.

At ten o'clock in the morning of the next day, Pang Xuelin drove to Jiangcheng International Airport and waited patiently for Yao Bingxia's arrival at the passenger exit.

About twenty minutes later, Pang Xuelin saw a beautiful girl with a ball head, wearing a burgundy loose sweatshirt, revealing a snow-white long leg, and stepping on canvas shoes, pushing a suitcase and walking out of the passenger exit.

Pang Xuelin waved his hand at Yao Bingxia.

"Brother Xiaolin!"

When Yao Bingxia saw Pang Xuelin, she immediately trotted over, like a koala, and rushed into Pang Xuelin's arms.

Pang Xuelin picked up Yao Bingxia and spun around, Yao Bingxia giggled, causing passers-by to look at the two from time to time.

Fortunately, Pang Xuelin wore a pair of sunglasses to go out, but no one recognized him.

"Brother Xiaolin, I miss you so much!"

Yao Bingxia hugged Pang Xuelin tightly and said sweetly.

Pang Xuelin smiled in her ear and said, "Okay, everyone else is watching, if you want to hug me, when you go home, you can hug me as long as you want." ”

"Hmph, it's beautiful!"

Yao Bingxia came out of Pang Xuelin's arms a little arrogantly, held her head high and smiled: "By the way, where is your car?" Which gate do we take to the parking lot? ”

"Follow me, go through Gate 2!"

Pang Xuelin took the suitcase from Yao Bingxia's hand and walked towards the second door, and Yao Bingxia quickly followed with small steps.

Holding Pang Xuelin's arm with both hands, his whole body seemed to be hanging on him.

"Walk well!"

Pang Xuelin stopped, his face was pale, and he looked at Yao Bingxiadao.

"Oh!"

The girl stuck out her tongue and immediately straightened up.

But after a while, she began to relapse again, and hung half of her body on Pang Xuelin.

Pang Xuelin was a little helpless, this girl was exactly the same as in the wandering earth world, but he didn't have any sense of boredom, but had an unprecedented sense of intimacy.

Coming to the parking lot, Pang Xuelin put Yao Bingxia's suitcase into the trunk, and then sat in the driver's seat.

Yao Bingxia came directly to the co-pilot's seat and sat down, turned his head to look at Pang Xuelin and said, "Brother Xiaolin, where are we going now?" ”

Pang Xuelin said: "Of course I went to your grandfather's house, where do you want to go?" ”

Yao Bingxiaqiao's face flushed a hint of crimson: "I want to go to where you live." ”

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