Tong Lingling never thought that she was eating... As a result, I saw this outrageous scene, which was a forced mouth open, and then desperately poured dog food into it... It is also soaked in concentrated sulfuric acid.

"You..."

"Can you be a little more reserved?" Tong Lingling said angrily with a dark face: "Can you treat me as a human being? I am also flesh and blood, and I also have emotions... I just broke up a while ago. ”

"Your brother-in-law often feeds me like this. Liu Yun'er ate the fish and meat that Lin Fan brought and said indifferently: "You can't change because of you... Isn't it a habit between me and your brother-in-law?"

Tong Lingling was speechless, not knowing what to say.

"I'm..."

"If I knew... I won't come. Tong Lingling said angrily: "I'm annoyed." ”

"I didn't let you come. Liu Yun'er said seriously: "Or... I'll send you home now?"

“...”

"Forget it. ”

"I'll be home in two days. Tong Lingling picked up a piece of white-cut chicken and dipped it in soy sauce, and said seriously: "Sister... After eating, I want to challenge you. ”

Hearing this,

Liu Yun'er didn't have any surprises, she had long known what Lingling was doing when she came back, just to defeat herself, and this was also an agreement with her in the past, as long as she defeated herself... I bought her a doll, and it turned out to... More than a decade has passed, and there has never been a victory.

however

Liu Yun'er has already felt the pressure, because in these two short years, Lingling's progress has been too fast, and when she defeated her last year, she won the final victory by narrowly winning.

"Your sister and I... I've been a little slack off in this area, and I'm in the field of physics now, so even if you beat me, what is there to brag about. Liu Yun'er said indifferently: "But... I accept your challenge, but what... I'm going to add one condition. ”

"Speak!"

"What conditions. Tong Lingling asked.

"You have to beat not only me, but also your brother-in-law, otherwise... I'm not going to give this doll away. Liu Yun'er said.

Brother-in-law?

Just him?

Tong Lingling was stunned for a moment, and said helplessly: "Sister... The conflict between our sisters has nothing to do with my brother-in-law, right? My brother-in-law didn't understand. ”

Words fall,

Tong Lingling looked at Lin Fan and said embarrassedly, "Brother-in-law, let me say this... Aren't you going to be angry?"

"No, it won't. Lin Fan smiled and ate the dish silently.

"Oh..."

"Then I'll move on. Tong Lingling looked at Liu Yun'er and said seriously: "Sister... I'm pulling your brother-in-law into the water. ”

"What do you mean by pulling down the water?" Liu Yun'er glanced at her and said expressionlessly: "You ask your brother-in-law if he wants to participate, if he doesn't want to, I won't force him." ”

As soon as the voice fell,

Tong Lingling hurriedly asked, "Brother-in-law, do you want to wade into troubled water?"

"You can try. Lin Fan said with a smile: "I'm pretty good at math." ”

“...”

"Brother-in-law!"

"It's not a math question for the college entrance exam, it's... The problem that my sister and I have to solve extends to science, and we will apply it to... For example, functional analysis, statistics, operations research, dynamical systems, topology, and so on. Tong Lingling explained.

"Oh..."

"Try it. Lin Fan still said with a smile: "I have scored a perfect score in mathematics before, I should... It shouldn't be a problem. ”

Tong Lingling was speechless, it was really not a family, she didn't enter a family, and she was as stubborn as her sister's temper.

"Ugh..."

"Then be whatever you want, and hopefully you won't break down then. Tong Lingling sighed and said silently.

soon

The three of them had supper,

Then Lin Fan put away the dishes and chopsticks, and prepared to bathe the bowls and chopsticks, at this time... A person came in quietly, and gently hugged him from behind Lin Fan, feeling a strong sense of oppression through his back, Lin Fan knew that it was anyone.

"Where's your sister?" Lin Fan asked.

"I'm looking for a topic. Liu Yun'er said.

"You're not looking?"

"Hmm..."Liu Yun'er nodded, and said softly: "Xiao Nizi has made too rapid progress in the past two years, and I have been engaged in physics research, how can I have time to study any mathematics, let her win once." ”

Words fall,

Liu Yun'er said solemnly: "But... You have to run her over!"

"The little girl has a pretty good personality, isn't it necessary?" Lin Fan said casually while washing the dishes.

"You know what!"

"Xiao Nizi's condescending tone towards you just now, I felt very uncomfortable listening to it. Liu Yun'er said angrily: "When will it be my man's turn for her to preach, but... I don't want to educate her as a sister, but I hope you will use your strength to completely convince her. ”

“...”

"What if your sister falls in love with me?" Lin Fan said with a smile: "Aren't all bloody dramas played like this?" As soon as the brother-in-law's overlord spirit was revealed, the sister-in-law's eyes were full of gold stars, and she praised her brother-in-law for being handsome and handsome, and then staged a passionate love triangle. ”

Words fall,

Lin Fan felt a sharp pain in his thigh.

"Rest assured. ”

"First of all, I'm prettier than her, she is self-aware, and secondly, you can't get into her eyes, so lazy... Who wants to raise you but me?" Liu Yun'er said angrily.

Lin Fan smiled awkwardly, as if... This is indeed the case.

Then

Tong Lingling's shouts came from the living room.

"Sister!"

"I'm ready. ”

“...”

"I see. Liu Yun'er shouted helplessly, and then said to Lin Fan: "I'll go first... You wash slowly. ”

Words fall,

Liu Yun'er left the kitchen and came to the sofa in the living room, and then saw a blank piece of paper on the coffee table, and four simple questions were written on the paper.

"What's the four questions?" Liu Yun'er frowned.

"You two, brother-in-law two, or you four, brother-in-law zero. Tong Lingling smiled and said, "Sister, what about yours?"

"I'm too lazy. ”

"Just do your thing... As long as you make three mistakes, you win, what do you think?" asked Liu Yun'er.

"Okay!"

Tong Lingling nodded, then handed Liu Yun'er a pen and said with a smile: "Sister... Let's go. ”

When Liu Yuner took the pen and began to read the question seriously, she realized... Why did this little girl next to her suddenly return to China, this is a long-planned plan, and the above problems are definitely not something she came up with.

This difficulty...

It is equal to the highest difficulty of the Putnam Mathematics Competition and the International Collegiate Mathematics Competition.

"Huh?"

"I said you little girl, for my sister's doll, is that so?" Liu Yun'er glared at Tong Lingling, and said with an annoyed face: "You have these questions... It must have been your mentor who came up with it, right?"

"Hey, hey..."

"I've lost for more than ten years, what's wrong with letting me win once?" Tong Lingling said with a proud face: "These questions were come up with me and my mentors. ”

Although Liu Yun'er was so angry that she couldn't help it... Keep doing it, of course... Liu Yun'er also wanted to test herself, how much she had regressed in mathematics, she felt that she had regressed a lot, after all, many years ago... Liu Yuner has already led a number of research projects.

As the leader of a research project, she does not need to be involved in the whole process, but plays an absolute role in several key issues, such as... Solve a problem, develop a rough solution, and assign the task to the researcher below.

The first question,

Regarding the direction of group theory, this is what Liu Yun'er is good at, but she soon found out that Xiao Nizi is not so kind, because there are many, many contradictions in this problem.

At this moment,

Lin Fan walked out slowly, watched the two sisters sit together, and did not step forward to pay attention to them, but went to the computer desk and started playing games.

For mathematics,

Lin Fan has not been very interested in it since he was a child, but physics needs to use mathematics, so that Lin Fan had to learn mathematics, and then accidentally won some mathematics awards, but compared with his physics achievements, Lin Fan's achievements in mathematics are not high.

But this does not mean that Lin Fan is weak in mathematics, on the contrary... He has a very strong talent for mathematics.

Just opened the game,

As a result, Da Bao and Er Bao slowly walked to their feet, rubbed them lightly a few times, and then suddenly jumped onto Lin Fan's thighs, and the two cats each occupied one leg and lay on it quietly.

In fact

Lin Fan has regarded Dabao and Erbao as his family, and Liu Yun'er is an existence of the same status, and Lin Fan also hopes... In the future, the little goblin is born, and Dabao and Erbao can get along happily with the little goblin.

Meanwhile.

The big goblin is racking her brains, thinking about the solutions to the problems in front of her, but she just can't think of them, she can't even solve a problem, which is obviously beyond her understanding of mathematics, which is already studying pure mathematics.

"Ugh..."

"Forget it. ”

"Shall I admit defeat?" Liu Yun'er sighed, silently put down the pen in her hand, and said to Tong Lingling, who was smiling beside her: "You are amazing... Sister lost. ”

"Yay!"

"I've finally won!"

Hearing her sister admit that she had lost, Tong Lingling jumped up excitedly, although... The means to win are a bit shameless, let those math gurus help them with their problems, but think about it... has been bullied by his sister for more than ten years, and it's time to let him win.

"Hey!"

"I'm losing... But your brother-in-law hasn't lost yet!" Liu Yun'er said angrily: "Isn't it a little early to be happy?"

“...”

"Sister?"

"You really won't let your brother-in-law do it, right?" Tong Lingling whispered: "Save some face for your brother-in-law..."

Liu Yun'er pursed her lips, in fact, she was also a little panicked at this moment, this little girl found those authorities in the field of mathematics to ask questions, the difficulty can be imagined... That's right, the big fool is really strong in mathematics, but it's not strong enough to be in the field of authority, right?

Then

Lin Fan just finished the game, took off his headphones, looked back at the sofa, and found that it seemed to be over.

"Huh?"

"It's over?"

"What is the final result?" Lin Fan asked curiously.

"Hey, hey!"

"My sister is defeated!" Tong Lingling said excitedly.

Lin Fan was stunned for a moment, he originally thought that Liu Yun'er would lose, but he didn't expect to be defeated in the end.

Picked up the two cats to the ground, then got up and walked to the sofa, bent down slightly to look at the question on the white paper, and immediately fell into shock.

it!

The little girl is not good!

At this point,

Liu Yun'er saw Lin Fan's silent appearance, knowing that he couldn't solve these problems as a big fool, but he didn't blame him in his heart, he could only blame himself for being careless.

suddenly

Lin Fan looked at the big goblin and asked with a serious face, "Baby, do you want to win?"

......