It was past five o'clock in the morning.

The sound of the car came from far and near, it was Lu Jichen who came back from the night train last night.

He parked the car, and when he returned home, he found the light in the living room on, and when he opened the door, he saw his mother sitting on the sofa in the living room.

"Mom, what are you doing sitting here early in the morning?" Lu Jichen felt a little strange, his mother got up early, but usually not so early.

"I'm back." Deng Yufang responded, looking weak.

"Didn't you sleep well last night, your face is a little bad?" Lu Jichen saw his mother's state clearly, and his brows furrowed.

"Come and sit down, I've got something to talk to you about." Deng Yufang got up and poured a glass of warm water for Lu Jichen and asked Lu Jichen to sit down.

"What's going on?" Lu Jichen drank it all in one gulp and asked, he felt that his mother was very wrong today.

Deng Yufang sighed slightly and said, "It's a terrible thing." ”

Hearing that it was Lu Xi's matter, Lu Jichen's heart tightened, and he hurriedly asked, "What happened to my little sister?" ”

"I didn't see you when you weren't there last night, but when I got up at about 2 o'clock, I saw the light on in the awkward study, and I thought she was forgetting the time, so I went up to urge her to sleep. I didn't expect her to answer the knock on the door, so I opened the door myself. ”

"Hmm."

"When I opened the door, I saw that Xi Xi was holding a pen and writing and drawing on the wall, all of which were mathematical symbols and words, and I couldn't understand what they were. But when I walked up to her, she didn't even seem to see me. She was so stupid at the time, I was afraid that something bad would happen to wake her up, so I didn't dare to call it. She kept writing until 4 o'clock. ”

"Done?"

"I put the pen on the table and went to bed alone, and she didn't look at me the whole time."

"Just writing math and not doing anything else?"

"What else is there to do, do evil, I don't even know when she got sleepwalking."

"Mom, don't worry, how many times have you seen this kind of sleepwalking of your little sister?"

"Once, but once it can frighten people, you don't know how anxious I was at that time."

"It's just once, then I'm relieved. Mom, sleepwalking isn't as scary as you think. Isn't the little sister just getting up in the middle of the night to do math problems, and it's not a dangerous thing, maybe it's a good thing, and in the future, our Lu family will have a big mathematician like Hua Luogeng and Chen Jingrun, and it will be a big deal. ”

"It's still a big deal, you're making money and you're confused. What's so good about this kind of thing, I just want to see her grow up peacefully, and she will be content without illness or disaster, what's so good about a great mathematician? ”

"My little sister is still young, her mind is active, and she thinks about math problems wholeheartedly, so she thinks about it day and night, and she dreams about it. When she grows up, it should be fine. Don't worry too much, but scare yourself. ”

"School starts in a few days, the sky is high and the earth is far away, we can't take care of her, so let's live in a successful family, okay?"

"Haven't we already discussed this issue, the second brother's house is far away from Huafu, and it is very troublesome to go to and from school every day."

Being far away from the school was actually just an excuse, and Lu Jichen thought about it even further.

The second brother has separated from his family and has his own family, which can no longer be regarded as his real own home. It doesn't matter if my sister stays there a few times a few times, just as it is to visit relatives, but if you stay for a long time, there will definitely be a collision. The second sister-in-law may not be as sharp as the eldest sister-in-law, but Lu Jichen is also unwilling to let his sister do it to test the second sister-in-law's belly.

If something like living at the eldest brother's house happens again, it won't be good for either the younger sister or the second brother.

What's more, he once tested his sister's tone, and his sister was more willing to live in school than living in his second brother's house. I think it's also because of the bad experiences of living in the eldest brother's house, which made my sister afraid of being under the fence.

"But what if I live on campus and sleepwalk?" Deng Yufang has her own concerns.

"Let's observe for a few days first, if Xiaomei's sleepwalking is really just an accident, then it doesn't matter, even the doctor doesn't need to see it, so as not to scare Xiaomei. As for the problem of living on campus, I checked Xiaomei's high school, and there is no strict rule that students must live in the school. We can rent a house near the school so we don't have to live on campus. ”

Lu Jichen came up with a way to comfort his mother.

"What are we supposed to tell her when we wake up?"

Deng Yufang was indeed frightened by Lu Xi's sleepwalking, and after Lu Xi fell asleep, she stayed by the side anxiously until dawn. She was also in a mess in her heart, so she was so masterless and talked to her son.

"Truth be told, it's best not to hide sleepwalking. And the evidence is still in Xiaomei's study, she can see it when she gets up, and we can't hide it. Instead of trying to hide it, it is better to make it clear to her, and it is better to block it. ”

……

Who will see the big dream? I know it all my life. Upstairs I slept enough in the summer, and it was not too late to go out of the window.

Lu Xi's good work and rest habits made her wake up at six o'clock, wash and change clothes, read for half an hour in the morning, and then go downstairs for breakfast.

Lu's mother and brother Lu saw that Lu Xi was the same as usual, doing what he should do, eating what he should eat, drinking what he should drink, being okay and having a good appetite, so they were relieved a lot.

However, even if you are relieved, your worries are still there, and hesitation is inevitable.

"Do you have anything to say to me?" Of course, Lu Xi saw that his mother and brother were worried, and noticed that his mother and brother wanted to speak and stopped.

"It's something to say." Mother Lu said in a cautious tone for fear of scaring Lu Xi, "It's just that you heard it, don't feel any pressure." ”

"What can be stressful?" Lu Xi's thoughts circled in his mind, and he didn't come up with anything that could make him feel stressed.

The discomfort and inconvenience caused by the rapid growth of the body is certainly an annoyance, but it is not a very stressful thing, not to mention that she has now been able to slowly start to get used to the changes in her body.

Then Lu Xi ate breakfast and went to her study under the guidance of her mother and brother.

She hasn't officially started reading books today, and Lu Xi hasn't entered the study yet, so when she went to the study, she was very puzzled.

What happened in the study?

"You'll know when you get in."

This is the answer she got when she asked her third brother.

And the answer was soon revealed, and Lu Xi pushed open the door of the study.

I saw that in the study, there was no bookshelf on the snow-white wall, which was more than six meters long, and mathematical words and symbols were written two meters wide. The dense and dense flow of numbers, black and white, the fierce impact of black and white, don't look too cool.

Lu Xi glanced at it and immediately understood, it was the answers to several questions that she had written with a marker.

The most conspicuous is one of the most difficult problems of geometric inequality, which takes up almost a third of the entire wall.

In the end, it was still discovered, Lu Xi knew what his mother and brother were worried about.

"Don't you think it's cool, Li Bai has "Sleepwalking in the Sky and Leaving Farewell", and I should think this is "Sleepwalking Mathematics Writing Farewell".

Analogy with Li Bai, is he really a big husband?

Of course, Lu Xi didn't think about this now, what she wanted was to ask her mother and brother not to worry too much about this matter. So the tone of this is relaxed, and the wording is heartless.

Speaking of which, these questions are past papers from the International Mathematical Olympiad (IMO) that she browsed before going to bed last night.

Because the difficulty is too great, she put it down without sorting out her clue for a while, and she was going to study and study it again today, but she didn't expect to be solved by herself when she woke up, and the direction and ideas of the solution are completely presented in her mind.

(Thanks for the reward, but vote 12,000 to urge the change...... We can only use ellipses to express our feelings, and then continue the book group - 371799791, welcome to join the group as a diver, it doesn't matter if you don't like to talk. Finally, recommended tickets, recommended tickets!! ）