Compared with the excitement of the graduate student brother next to him, Xu Chuan calmed down a lot, took the invitation from Zhou Hai and looked at it.

Well, the format is still no different from the previous one, the same plain.

"Do I need anything to prepare?" After looking at the invitation letter, Xu Chuan asked Professor Zhou Hai.

After all, it is the 'first time' to receive such an invitation, and you still have to ask about the specific operation.

Zhou Hai smiled and said: "Don't be too nervous, you can change your proof paper, condense the essence, and be concise, the key point is some questions in the back, you have to put a little more effort into this, the number of courts here will sort out a list of possible questions for you, and you will take it back and take a look at it later." ”

"Oh, by the way, this time out, the school will be responsible for reimbursing your air ticket and room and board, remember to keep the invoice when the time comes, find the school for reimbursement, and the rest will be nothing."

Nodding, Xu Chuan said he understood.

On the side, Cai Peng came over and asked, "Big man, can you bring people with this invitation, can you take me with me for a long time, I will pay for it!" ”

Xu Chuan smiled and said, "You have to ask the teacher about this, I don't know." ”

Zhou Hai glanced at it and said angrily: "Okay, don't be ashamed, hurry up and write your graduation thesis, it's been delayed for half a year, and there is no title." ”

......

After solving the problem in his hand and receiving an invitation letter from the Princeton Mathematical Society, Xu Chuan got up to say goodbye to Professor Zhou Hai with satisfaction, and got up to prepare to go back to the dormitory.

As soon as he walked to the office door and stepped out of the door with one foot, he suddenly remembered something else, turned around and turned back again.

"Huh? Anything else? Seeing Xu Chuan turn back, Zhou Hai asked curiously.

"That, teacher, can you give me her contact information last time you asked me to deliver medicine? I haven't given her the money for the cold medicine here, and it's been delaying for days. ”

"Oh, this thing, you wait, I'll look for it, the number has been sent to you."

Hearing this, Zhou Hai took out his mobile phone and flipped through the address book, found the number and sent it to Xu Chuan.

"Thank you, teacher."

"Well, thank you."

Zhou Hai smiled at Xu Chuan, his smile was a little narrow, Xu Chuan felt a little strange when he saw it, needless to say, of course I have to thank others.

......

Back in the dormitory, throwing the schoolbag on the bed, Xu Chuan picked up the math book from the table, and just as he was about to read it, his eyes fell on the hot water bottle in the corner.

Patting his head in annoyance, he took out his mobile phone and saved the number sent by Professor Zhou Hai to the address book.

But when he made a note, Xu Chuan was stunned, his finger hovering on the screen, not knowing what to note.

Because he didn't seem to have asked the name of that senior sister from beginning to end......

"Forget it, let's note a senior sister first."

Xu Chuan thought about it and knocked on the name column, anyway, there were not many people in his address book, so he wouldn't be confused at that time.

Note the name and click on the message: "Hello senior sister, I am Xu Chuan, who had a cold two days ago, and you sent me medicine, when is it convenient for you, I will return the hot water bottle to you." ”

Suddenly, a message was sent.

The phone was put down, Xu Chuan picked up the math textbook and didn't look at it twice, and with a ding dong, the message came back.

"Hello, may I ask when you are in the dormitory, I'll just go over and get it."

"No, I sent it to you, I haven't thanked you yet, and I haven't given you the money to buy cold medicine."

"No need, I'll go over and get the hot water bottle, if you're in the dormitory now, just wait for me for a few minutes."

After a brief exchange, Xu Chuan scratched his head and glanced at the time on his phone, it was more than five o'clock in the afternoon, it was time for dinner.

"Okay, then I'll wait for you in the dormitory."

replied, Xu Chuan felt a little embarrassed, after all, it was someone else who helped him, forget it, I will invite the senior sister to Xiaoxianzhuang to rub a good thank you.

After the message was sent, the other party did not reply again, and Xu Chuan also put down his mobile phone and picked up the math book again.

About six or seven minutes later, there was a knock on the door.

Xu Chuan hurriedly put down the book and went over to open the door, standing was the senior sister who gave him medicine two days ago, still with a familiar appearance, with long black hair hanging down, carrying a backpack, and lowering her head to see her face a little clearly.

"I'm really sorry to trouble you to run again."

"No, it's okay, just give me the hot water bottle." The senior sister whispered back and raised her head slightly.

"Wait a minute."

Xu Chuan answered, turned around and walked into the dormitory, lifted the boiling water bottle from the corner, and brought his mobile phone and keys.

Outside the door, the senior sister stretched out her hand and was about to take the hot water bottle, but Xu Chuan didn't want to give her the idea at all, and said with the hot water bottle:

"Senior sister, it's time to eat, let's go have a meal together, I haven't thanked you for the cold before."

It seems that she didn't expect Xu Chuan to behave like this, and the senior sister paused for a moment, and refused in a panicked whisper: "No, no need." ”

"Hey, if you hadn't sent me medicine and hot water, I don't know when I would get better when I have a cold, I know that there is a restaurant that tastes good, senior sister has a face."

Xu Chuan said, and slammed the dormitory door shut with his backhand.

Looking at the locked dormitory door, the senior sister froze again, glanced at Xu Chuan, and then at the hot water bottle in Xu Chuan's hand, Leng seemed to be entangled and hesitating in place, and nodded after half a ring.

"I'm ashamed, senior sister, I don't know your name yet?" The two walked towards the outside of the school one after the other, and Xu Chuan suddenly stopped and turned his head and asked.

The senior sister who followed behind didn't expect him to stop and almost hit it.

"Liu, Liu Jiaxin." Senior sister whispered.

"Liu Jiaxin." Xu Chuan nodded, wrote down his name, took out his mobile phone, and modified the notes in the address book.

"By the way, is your prestige a mobile phone number? I've added you, and I haven't given you the money for cold medicine yet. ”

After changing the note, Xu Chuan copied the number to Weixin, searched for a Wei signal, and clicked to add.

"I'll add you, through it, senior sister, I'll transfer the money for cold medicine to you." Xu Chuan shook his mobile phone and said.

......