We ordinary people also need to fall in love.

During evening self-study, Chen Qiuhe was scratching her head, looking at a math problem.

"Li Mubai, do you know how to do this question?"

Li Mubai took a look and confirmed that it was a question he didn't know how to answer.

"Won't."

"I'll ask Xie Shu during break and then I'll teach you when I get back."

Li Mubai was somewhat surprised, not expecting that she knew Xie Shu. However, he didn't ask why, because asking would just mean that he was paying attention to Xie Shu.

By the time of the break, Li Mubai had finished his math homework, except for the problem he had just solved, which he couldn't figure out even after thinking about it for a long time.

Given set...

(1) Find the range of values ​​for the real number a such that C ∈ B;

(2) Find the range of values ​​for the real number m.

Li Mubai has already solved the first question, but not the second.

"Do you want me to teach you?" Chen Qiuhe had already asked and returned, proudly waving the test booklet in her hand.

"How did you solve it?"

"Beg me and I'll teach you."

"Then I'll go ask Feng Wanli." Li Mubai wasn't buying it.

"Hey, look how impatient you are, I'll teach you."

Chen Qiuhe moved her chair closer to Li Mubai, pointing to his workbook and saying, "This problem requires transforming the necessary but insufficient condition into a proper subset relationship between sets..."

Chen Qiuhe had almost no scent on her; only when you got close could you smell a very faint fragrance, like the scent of sun-dried grass mixed with a hint of laundry detergent.

"Did you understand?"

"Understood."

Then Chen Qiuhe beckoned to him.

"What?"

"Tuition fee! It took me three minutes of my time and five percent of my energy to teach you."

"Why don't you mention that teaching you Chinese and history also consumes my time and energy?"

"Oh right, but it seems like you're doing this long-term, so I'll give you some tuition money."

"Never mind..." Li Mubai thought she was really going to give him some tuition fees, but Chen Qiuhe took out a handful of glass candies from her pocket, counted them, and placed them on Li Mubai's table.

"Here, have ten. That's your tuition for this week."

"You eat so much sugar, aren't you worried about cavities?"

"Don't worry, my teeth are healthy."

Li Mubai picked up a piece; these glass-like candy wrappers contained colorful candies.

It would look even better in the sunlight.

After evening self-study, the students all went back to their dormitories. The girls' dormitory was right across from the boys' dormitory, but the girls' dormitory used frosted glass, while the boys' dormitory used ordinary glass. Especially in the summer, some boys who were proud of their good muscles would wander around the corridor shirtless.

The girls' dormitory also has six-person rooms.

Chen Qiuhe, Ye Manqi, and Liu Ting are roommates.

"Manqi, I've already found out. He's bad at math, but you're pretty good at it, right? You could use tutoring as an opportunity to get closer to him," Chen Qiuhe said to Ye Manqi in a low voice as she sat down next to her.

"I see."

"Hmm? Is there some gossip?" Deng Yi asked suspiciously, watching the two of them acting furtively.

"No, nothing, we were just discussing what to eat tomorrow."

"I don't believe you at all. You were just talking about 'it,' is 'it' a boy or a girl?"

"Deng Yi, you misheard. We didn't say anything about him," Chen Qiuhe vehemently denied.

"I don't believe you, Shu. Did you hear what they were saying just now?"

The girl was wearing a beige nightgown, leaning against the headboard with a book in her hand. "I don't know, I'm reading."

"All right."

Xie Shu took out his phone, looked at Qiu Ke's new poem on the confession wall, read it a few times, then put down his phone and continued reading "Selected Poems of Gu Cheng: The Storm Makes Me Sleep".

Li Mubai finished reading the collection of essays and was about to go to sleep when he picked up his phone. It was almost midnight, and there was still one unread message on QQ.

Yan Shu: "Your classical poems seem better than your modern poems. How did you write them? You seem to have mastered all the rules of tonal patterns and prosody?"

The message came more than ten minutes ago. This was the first time Yan Shu had asked him about the creative process. Usually, he would send the poem to the other party, who would reply that they had received it and sometimes share their opinions briefly.

Li Mubai thought for a moment, then prepared to reply and go to sleep. Yan Shu was probably already resting, after all, she was just a student like him and had to go to class tomorrow.

"The rules of tone and rhyme are relatively easy to solve; there are specialized books that teach this. However, it's quite difficult to write well. I only imitate the ancient poems in our textbooks when creating my own works."

The message was sent, and I was about to shut down the phone when Yan Shu replied instantly.

Yan Shu: "What book?"

Li Mubai was surprised that the other person was still awake so late; his roommate had already started snoring.

Li Bubai: "Wang Li's 'Study of Chinese Poetics'".

Yan Shu: "Can reading this really solve the problem of tonal patterns and prosody?"

Li Bubai: "Yes, it's not just about tonal patterns. This book also involves a lot of poetics. It's quite profound and a large book. It would take a lot of time for us middle school students to finish reading it."

Yan Shu: "Okay, thank you."

Li Bubai: "It's nothing."

Yan Shu: "It's getting late, I'm going to sleep now. We have classes tomorrow, you should go to sleep early too. Goodnight."

Li Mubai felt it was weird for two boys to say goodnight to each other, so he replied with "goodbye".

……

Thursday.

"Oh haha, it's Thursday today, school ends tomorrow, Friday!" Chen Qiuhe said excitedly.

Pingyang No. 6 Middle School is a semi-closed school. Students live at school from Monday to Friday and are not allowed to go out. They can only go home on the weekend.

Li Mubai felt a little sleepy, probably because he had gone to bed late the night before. He peeled open a candy, which tasted sour, and was about to throw the wrapper away when Chen Qiuhe stopped him.

"Candy wrappers should not be thrown away carelessly."

"Is it radioactive?"

"What radiation? This candy wrapper is so pretty for folding origami cranes and roses!"

"Oh, that doesn't mean much to me, I won't fold those."

"Then give it to me." Chen Qiuhe took out a pink and white round tin can with a rabbit drawn on it from her schoolbag, opened it, and gestured for him to put it in.

Li Mubai glanced inside and saw that there were already quite a few candy wrappers. He put the candy wrappers he was holding into the candy wrapper.

"I never knew you had such an innocent and childlike heart."

"What are you talking about? I'm only 17, not 30 or 40." Chen Qiuhe lightly punched him.

"So you're 17."

"Aren't you 17 too!"

"How did you know?" Li Mubai asked, puzzled. He remembered that he had never told Chen Qiuhe his age.

"I guessed, judging from your reaction, that's it. When is your birthday?"

His birthday is June 20th, but it's been a long time since he celebrated it. His family never celebrates birthdays, not only his but also his parents'.

In fact, birthdays are just special days for people; they are essentially just ordinary days, Li Mubai always told himself.

"June? What's wrong?" Li Mubai didn't tell Chen Qiuhe the specific time. He was used to not celebrating his birthday, and he felt uncomfortable if someone suddenly wanted to celebrate it for him.

"Haha, that's younger than me. I was born in January, so you have to call me 'older sister'."

Calling you my foot.

Li Mubai ignored her and took out his book to prepare for morning reading.