"By the way, Pang, it's Christmas soon. I'm going to go back to the United States and get the contribution done. Do you want to go to Princeton with me?"

Dewar Witten thought about it and said again.

Dehua Weiteng signed a two-year contract with Tsinghua University. He originally thought that it would take at least one to two years to develop the m theory, but he did not expect that before the end of this year, he had already completed the creation of the m theory with Pang Xuelin.

However, since he has come to Tsinghua University, Dehua Weiteng has no intention of terminating the contract with Tsinghua University in advance.

In the past six months, Tsinghua University has given him extremely high freedom and has also been very comfortable in cooperation with Pang Xuelin.

The two of them exchanged views on the latest physics and mathematics progress from time to time, and both felt that they benefited a lot from each other.

Moreover, under the leadership of Dewar Witten, many cooperation agreements have been reached between Princeton and Tsinghua University.

It even directly led to a joint graduate training program for the Department of Mathematics and Physics.

At the same time, Princeton University also made a suggestion, hoping that Pang Xuelin could serve as an adjunct professor at Princeton University and only needs to stay for three months every year.

Pang Xuelin didn't have much opinion on this.

After all, the United States is a country that cannot be avoided whether it is the patent issues of sildenafil and atorvastatin or the future if it wants to make a difference in the Internet field.

Staying in the United States for several months every year will help Pang Xuelin have a clearer understanding of the development of the Internet and the latest international economic points.

Pang Xuelin said: "Okay, anyway, I have to stay in Princeton for two months every year. This time I will take advantage of Christmas to go to the United States with you."

Witten smiled and said, "Okay, come to my house for Christmas, and I think Jenphine will definitely welcome you very much."

Jenphine is Witten's wife. She and Witten have a son and a daughter, both of whom are already adults.

My eldest son has just graduated from university and is a programmer. It is said that he has already joined Microsoft.

My youngest daughter has just been admitted to the School of Film Arts at the University of Southern California.

After Witten came to China, Jenfne came here for half a year, and Pang Xuelin and Witten got along well.

However, this time I went to the United States, Ah Qing couldn't go there anymore.

In the first half of this year, after Ah Qing transferred to the Tsinghua University Affiliated Primary School for class, he passed the school test and was able to enter the fourth grade for study because his foundation was too poor.

Fortunately, this girl is also very successful. With Pang Xuelin urging her to tutor, in half a year, Ah Qing's grades have come to the top five in the class.

If nothing unexpected happens, there will be no problem in entering Tsinghua High School after graduating from elementary school.

"A Qing, this time my brother goes to the United States, you have to listen to Sister Liu's words carefully. OK, at most, my brother will come back from the United States in three months!"

Pang Xuelin touched Ah Qing's head and said.

"Um!"

Although A Qing's eyes flashed with reluctance, he still nodded obediently.

Pang Xuelin smiled and looked up at Liu Jiahuan and said, "Jiahuan, please take care of Ah Qing during this period."

Liu Jiahuan looked at Pang Xuelin and smiled and said, "Professor Pang, don't worry, with me here, you can go to the United States with peace of mind."

Since the interview at the beginning of the year, Pang Xuelin and Liu Jiahuan have maintained a good relationship with each other.

Liu Jiahuan likes Ah Qing very much, and occasionally takes the weekend to visit Ah Qing and take her out to play.

Therefore, when Pang Xuelin went to the United States for a long time to think about it, he decided to speak to Liu Jiahuan and hand Ah Qing over to her care.

Liu Jiahuan agreed immediately.

Her family is in the suburbs of the capital, she works on CCTV, rents a small room, and lives alone in the square and feels deserted.

Now that she has Aqing's company, she feels very happy.

On December 15, 1993, Pang Xuelin and Dewa Witten officially boarded their flight to New York.

After a long flight of thirteen hours, the two arrived at Newark International Airport. As soon as they walked out of the passenger exit, they saw a young man in his twenties standing at the passenger exit holding a sign with the names of the two, waiting at the passenger exit.

"Hey, Eddie, long time no see!"

Dewar Witten went up and hugged the other party, then turned around and introduced: "Pang, let me introduce you to this Morse Eddie, Delinie's assistant!"

"Hello, Professor Pang, I'm very happy to see you!"

Eddie shook hands with Pang Xuelin.

"Eddie, I'm very happy to see you too!"

After a few greetings from the three, Pang Xuelin and Witten followed Eddie to the parking lot and boarded a Chevrolet off-road vehicle.

Two hours later, the car drove into Princeton town. The residence arranged for him by Princeton University was just opposite the Witten family. It only had two floors, two bedrooms upstairs, and there were living room, study, kitchen, dining room, and a fireplace downstairs. The rent was 1,000 US dollars a month. The money was paid for Pang Xuelin by Princeton University.

After Pang Xuelin placed his luggage, Witten came over and knocked on the door and said that Jenphine had prepared dinner for their arrival.

That night, Pang Xuelin had a meal at Witten's house, a typical American meal, mashed potatoes, fried steak, tuna salad, and a roasted turkey.

The next morning, Pang Xuelin and Witten went to Deliney's office together and then went through the procedures for the adjunct professor at Princeton University.

Although he is a part-time job, he only needs to teach an undergraduate course in Princeton every year and stay in Princeton for more than three months, Pang Xuelin can still receive a monthly salary of 5,000 US dollars, twenty times his salary in China.

It is said that big guys like Delinie and Wiles have an annual salary of more than 300,000 US dollars.

After completing the entry procedures, because the Christmas holiday is about to be on the left, Pang Xuelin has nothing to do for a while.

So on the third day after coming to the United States, Pang Xuelin went to the used car market and spent 12,000 US dollars to buy a five-year-old second-hand Ford tempo as a transportation tool during his time in the United States.

He got his domestic driver's license as early as August this year, and before coming to the United States, he applied for an international driver's license translation. In addition, he had been used to the traffic rules in the United States in his previous life, so he was not worried about driving.

On December 19, early in the morning, Pang Xuelin got up and drove out.

This time, his destination is Cambridge in the Boston area of ​​Massachusetts in northeastern New York.

It took nearly five hours to finally arrive at Harvard University.

He parked his car in a parking lot on the Harvard University campus, and Pang Xuelin got out of the car and walked around the campus.
Chapter completed!