Chapter 357

The weekend was another bright, sunny day. At 8 o'clock in the morning, Xu Qingzhou was shooed up by Wang Xiaping to eat breakfast.

After finishing breakfast, Xu Qingzhou went to the balcony to bask in the sun and incidentally breathe in some fresh morning air.

Wang Xiaping tidied up the dining table, glanced at Xu Qingzhou, who was taking deep breaths, and said with disdain: "Can't you go outside to breathe it?"

"Is there a difference between being on the windowsill and going out into the residential compound?" Xu Qingzhou answered lazily.

At this hour, the compound was full of elderly people out for a stroll; once caught, they would ask this and that.

They would be imparting study experiences to their own grandsons and granddaughters.

"The older you get, the less you want to step out of the gate." Wang Xiaping shook her head and pulled Xu Lao out for a stroll.

Xu Qingzhou narrowed his eyes and basked in the sun for over ten minutes before returning to the bedroom to continue his calculations.

A meal must be eaten one bite at a time, and research is the same. Take the AB effect model, for example; it looks like a thousand threads, but in reality, it's not simple. However, as long as you take it step by step, it's still quite smooth.

The multi-particle system wave function was already done.

Next was the influence of electromagnetic potential on the phase.

After racking his brains all morning, Xu Qingzhou planned to introduce a phase modulation function.

In the process of calculation, he also had preliminary ideas regarding the influence of non-classical effects on the wave function phase.

One can use operators and matrices; the result obtained by the former acting on the wave function is the measured value of the physical quantity, while matrix operations and eigenvalue problems in linear algebra help to make subtle adjustments to quantum systems.

When the phase change in the AB effect is transmitted to the entangled state, it leads to the dynamic evolution of the entangled state. This evolution may include processes such as the deconstruction, reconstruction, and transformation of the entangled state, which describe the complex changes of the entangled state in time and space.

According to Xu Qingzhou's estimate, the physical experiment should yield results by early September.

In the afternoon, Wang Xiaping went to play mahjong, and Xu Shouyun prepared to go to a teahouse with a few old friends.

Xu Qingzhou was busy until three in the afternoon before going out to buy some groceries and cook.

"Mom, dinner is almost ready."

"Dinner is ready? Good, after I finish this round... My son, he cooked dinner at home... Hey, where did I get such luck? It's still early~ beep~ beep~"

Hearing the phone hang up, Xu Qingzhou could imagine Ms. Wang grinning from ear to ear. He smiled and shook his head, then called Xu Lao, who was still in the compound.

Night fell, and the lights of ten thousand homes lit up outside the window. The bustling city of the day quieted down at this moment.

The three people in the Xu family had long finished dinner and were sitting in the living room watching TV.

At the same time, it was also very lively at the Song family's home.

The group had just returned from eating out.

Song Shisong and his eldest brother, Song Qiwen, sat on one side chatting about the developments of the last two years, while the others gathered around the sofa, watching TV and chatting about daily life.

Thanks to the support of his father-in-law's family in Shanghai, Song Qiwen had made quite a lot of money investing in real estate over the years.

Song Yao was with her cousin Song Lulu, who happened to be in her second year of high school this year.

"Cousin, is the library at Jingda University full of people every day, to the point where you can't even find a seat?"

Song Lulu had an active personality and wasn't shy. She didn't retreat because Song Yao looked cold; instead, she was like a curious baby.

"It's like that during finals."

"Why?"

"Finals require review, everyone is afraid of failing, and some people go to embrace Buddha's feet at the last minute."

"Ah, there are people who slack off at Jingda too?"

"They are everywhere. Some might linger in university life and abandon their studies, while others have mental health issues because the pressure is too great..."

On one side, Song Qiwen's wife, Zou Tong, was talking about the places they had visited during this period and what they had bought.

Zhang Junli echoed from the side, occasionally exaggerating a few points, which made Zou Tong talk even more happily.

Soon, Zou Tong's gaze fell on the two girls, and she said with some emotion: "Time flies so fast. In the blink of an eye, Xiao Yao is already a big girl."

"Children, that's just how it is. The last time I saw Lulu, she was only in the second year of middle school." Zhang Junli smiled faintly. This sister-in-law had a slight tendency to compare and liked to show off, but she wasn't a bad person; she was even a bit of a "silly, sweet" type, the kind that wouldn't survive two episodes in current family ethics dramas.

"Yes, in a few more years, when she finishes her studies, it will be time to worry about her husband's family." Zou Tong paused and asked, "Xiao Yao must be dating by now, right?"

Zhang Junli said: "She is already dating."

"Dating so early? Where is he from?"

"He's a local from Rongcheng."

Zou Tong sighed, looking a bit disdainful, and then earnestly advised: "Xiao Li, when a daughter dates, we as parents still have to keep a check. Xiao Yao is still young. Dating requires caution—family background, values, education... these all need to be considered."

"As for the children's affairs, they can decide for themselves. We can't manage that much." Zhang Junli smiled and shook her head.

Zou Tong said with regret: "I was actually going to introduce someone to Xiao Yao."

"My second sister's son was admitted to Jingda as a graduate student this year. He's a very handsome young man, and his family has already prepared a marital home for him in Kyoto."

"Sister-in-law, their relationship is very deep, there's no need for that." Zhang Junli shook her head slightly and thought for a moment before saying: "However, I do know a nice young girl, the daughter of a neighbor, who is also studying in Kyoto."

Hearing it was someone else, Zou Tong lost interest: "There's no rush for this matter, I'll go back and ask first."

Song Qiwen sighed inwardly. His wife was pampered and spoiled, a rich housewife who stayed at home all day; how could she be a match for someone like his second sister-in-law, who mixed in official circles?

Everything the other person said made you feel comfortable, which precisely showed that their level was far higher than yours.

On the side, Song Lulu opened Weibo, flipped to someone she followed, shared it with Song Yao, and said: "Cousin, you were also at Wutong Middle School for high school, do you know him?"

Song Yao looked at the Weibo avatar and said: "Xu Qingzhou?"

"Right, that's him, my idol!"

Zou Tong took over the conversation: "This child has always liked that Xu-whatever-Zhou from your Jingda. She says this person is a study god."

"His name is Xu Qingzhou." Song Lulu corrected.

"I know him."

"Ah? You really know him!"

Song Yao nodded and said seriously: "He is my boyfriend."

"..."

"Cousin, you are dating Xu Qingzhou?!" Song Lulu's eyes widened.

Song Yao nodded.

Zou Tong was stunned. She told her daughter every day how amazing this Xu Qingzhou was. Later, she also asked around, and it seemed he was indeed very amazing, having solved some world-class problems and being some kind of young mathematician.

"It's like this, actually, Xiao Yao's boyfriend is Xu Qingzhou."

Song Shisong said apologetically: "Eldest brother, sister-in-law, I'm sorry. Because the two children wanted to keep a low profile, we kept it a secret."

"Xu Qingzhou, ah. Shisong, your Xiao Yao has a very good eye." Song Qiwen praised. To be honest, he was truly envious.

No wonder they didn't look down on that kid from the second sister's family; even a fool would know how to choose.

"It's all because the children are a good match." Song Shisong smiled lightly.

"Very good, very good." Zou Tong's smile was a bit stiff. She had spent the whole day talking about how well her own family was doing, but it seemed... it wasn't as satisfying as this.

Thinking about how she had just boasted about the child from the second sister's family, her face stung a bit.

No, how did this start comparing sons-in-law?

Completely unprepared.

Looking at her own daughter again, she was only in her second year of high school... she had lost.

Song Lulu didn't think that much; her little expression was so excited. Her idol was actually dating her cousin!

At this moment, Song Yao's phone screen lit up. She glanced at the message: "Xu Qingzhou is here, I'm going out for a bit."

"Study Xu Shen is here!" Song Lulu grabbed Song Yao's arm and asked pitifully: "Cousin, can I... can I go with you?"

"I'll ask him."

Song Yao sent two messages, and the phone dinged. She looked at it and nodded slightly: "Let's go, he's waiting for us downstairs."

Xu Qingzhou was at the entrance of the compound and soon saw two girls walking out.

"Study Xu Shen!" Song Lulu's eyes were full of stars.

"Study Xu Shen sounds weird, let's change the title." Xu Qingzhou had a strange expression; being called "Study Xu Shen" in reality was too "chuunibyou."

"Then..." Song Lulu's expression froze. She looked at Xu Qingzhou and shouted: "Brother-in-law."

Xu Qingzhou was stunned for a moment. He looked deeply at Song Lulu and showed an expression of "a child who can be taught." This little girl had broadened her path.

"Just call him 'Xu Qingzhou'." Song Yao said gloomily. It hadn't even reached that point yet; they hadn't even gotten their marriage certificate, and she was already calling him brother-in-law.

"Calling him by his name is too distant." Song Lulu said with a bitter face.

"Calling me by my name is indeed distant." Xu Qingzhou nodded slightly and said in a deep voice: "Better call me 'future brother-in-law.' I'll take the loss and let your cousin take advantage of me... hiss~"

Before this guy could finish, his waist was fiercely twisted half a circle.

Finally, after discussion, Song Lulu called him "Brother Zhou." Along the way, she couldn't hide her excitement, secretly sizing up the two people holding hands, feeling moved in her heart. Xu Qingzhou was different from what she had imagined. In interviews, he was gentle and elegant with extraordinary speech; on Weibo, he was a little bit "pretentious." Who would have thought he would be so "slouchy" in daily life?

Her cousin, however, still had the look of her childhood.

Just like the domineering spirit she had when she stood up for her when they were young.

Night fell, and the temperature finally wasn't as stifling as it was during the day.

The three of them soon arrived at the snack street, and each bought a cup of milk tea.

Xu Qingzhou pointed to the barbecue stall on the side and asked Song Yao: "Do you want to buy some garlic sprouts?"

Song Yao didn't speak.

Song Lulu stared at the things on the grill again and again, "Garlic sprouts? These are chives, right?"

"I once saw someone mistake chives for garlic sprouts." Xu Qingzhou couldn't help but laugh when he thought of Song Yao's appearance at that time.

"Mistake chives for garlic sprouts?"

(In the classroom)

Song Lulu giggled, "How silly can one be to mistake even this?"

Song Lulu didn't notice at all that the cousin beside her was already clenching her fists.

"Exactly, someone who can mistake these two things, tsk tsk." Xu Qingzhou echoed.

Slap~

Song Lulu turned her head. Her cousin had a faint smile on her face, and beside her, her future brother-in-law was standing straight. "Cousin, did you guys hear any sound?"

"No." Song Yao shook her head, looked at Xu Qingzhou, and asked: "Did you hear it?"

"No."

Xu Qingzhou, who had just been hit, shook his head.

"Then I must have heard wrong." Song Lulu nodded. After saying that, she continued to pick skewers.

Xu Qingzhou rubbed his waist, staring at Song Yao with resentment.

School Beauty Song hummed lightly. After beating someone up, she felt refreshed and ignored this person, choosing food with her cousin.

The three of them strolled on the road until 9:30 before starting to walk back.

At the entrance of the compound, they prepared to part ways. Song Lulu seemed even more reluctant than Song Yao. She added Xu Qingzhou on WeChat and made an appointment to go to Kyoto next time, insisting that Xu Qingzhou must give her a signed photo.

Happily hugging her phone, Song Lulu remembered something more important: "Cousin, you won't be jealous, right?"

Song Yao smiled and shook her head.

"That's good." Song Lulu breathed a sigh of relief, "How should I put it, brother-in-law is the object most worshipped by us academic slackers... uh, although it's not quite the same as the idol image I imagined, he is still the spiritual totem of us academic slackers..."

The third day after coming home.

Xu Qingzhou had been a homebody for several days in a row and finally finished the content regarding non-classical effects, and also made corresponding adjustments to both the wave function phase change model and the entangled state model.

At the same time, he also introduced the concept of entanglement entropy, attempting to link the two models using correlation functions.

Xu Qingzhou put aside the content regarding the AB effect for a moment and began to tinker with the previously stuck content of bilinear equivalent forms.

【Proposition 5.1: Assume w and w' are two direction sets containing v and v' respectively, satisfying the angular separation condition】

Here, for the sake of the lemma's assumption, one can use parabolic scaling techniques to transform the bilinear terms falling into the same scale into the standard situation appearing in Lemma 5.1.

Xu Qingzhou narrowed his eyes.

Suddenly, he had a flash of inspiration.

He worked hard and diligently, as if helped by a god, picking up his pen and writing rapidly.

Wang Xiaping brought in a plate of fruit.

Seeing Xu Qingzhou drawing strange symbols on the draft paper, she didn't disturb him. She put down the fruit and retreated, even thoughtfully closing the door.

"Still busy?" Xu Shouyun asked.

"Yeah, this child, he's busy with those things every day, and he doesn't even know how to rest..."

Xu Shouyun held his teacup and said indifferently: "The child is grown up, let's not manage too much."

"When have I managed too much?"

"Then what are you nagging about all day?" Xu Shouyun said.

Hearing this, Wang Xiaping wouldn't have it: "Xu Shouyun, you make it clear to me, what do you mean by I nag all day?"

"I'm just telling you to say a few words less, the children know what they're doing."

"I say a few words less? No, Xu Shouyun..." Wang Xiaping noticed her voice seemed a bit loud, lowered it, and said with annoyance: "You tell me, which of the big and small things in this family isn't nagged out by me?"

"I'm talking about Qingzhou, not about these things in the family..."

"Isn't it the same thing?"

"..."

In the bedroom, Xu Qingzhou stopped his pen. Hearing the low voices in the living room, he couldn't help but shake his head.

According to his understanding, Xu Lao shouldn't take long to admit his mistake.

It had been a long time since he heard these two bickering.

Sure enough, a few minutes later, Xu Lao softened his stance.

Xu Qingzhou nodded slightly. Xu Lao was still Xu Lao, but it had to be said, this method was good and worth learning.

12 o'clock at night.

Xu Qingzhou leaned back in his chair and let out a long breath, looking at the draft paper on the table with some helplessness. Sometimes, a flash of inspiration is just like "that girl likes me"—it's an illusion.

He couldn't solve it, so he didn't struggle. He simply washed up and went to bed.

Xu Qingzhou and Song Yao stayed at home for 10 days.

On Wednesday, they had a small gathering with Guo Ziyang and Ding Jiahui, eating old-style hot pot together. The rest of the time, they were basically busy with their own things at home and accompanying their parents.

Guo Ziyang still had to be busy with his project, and Ding Jiahui was also preparing to go back to review for her certification. Therefore, these two left even earlier than Xu Qingzhou and Song Yao, leaving on August 15th.

On August 22nd, Sunday, Xu Qingzhou and Song Yao took a flight to Kyoto.

Yandong Garden.

"Hoo~"

The two of them collapsed on the sofa.

Er Miao came out of the cat carrier, wagging its tail, happily patrolling the living room.

After traveling for a day, they were too lazy to cook and simply ordered takeout.

After eating and tidying up the house, it was already 10 o'clock at night after they finished showering.

Bedroom.

"Lie down."

Song Yao pointed her chin, signaling Xu Qingzhou to consciously lie down.

Xu Qingzhou: "I refuse."

Usually, she would pretend to press him down, but now she didn't even press him, directly telling him to lie down.

"Xu Qingzhou."

"No, this is my bottom line!" Xu Qingzhou's attitude was firm. Lying down voluntarily and lying down passively were two different concepts, concerning a man's dignity.

Song Yao bit her lip, her tone softening: "Xu Laoshi~"

Xu Qingzhou remained unmoved. Testing a cadre with this? Which cadre couldn't withstand the test?

Song Yao reached out and wrapped her arms around Xu Qingzhou's neck.

"Xu Laoshi~"

Xu Qingzhou remained very calm.

"Xu Laoshi~"

"Impossible."

Song Yao hugged Xu Qingzhou, lifted her foot, and used it to hook open the second-layer drawer behind her. Xu Qingzhou's collection of various silk stockings was all here.

"Xu Laoshi~"

Pfft~

Someone collapsed onto the bed.

"Xu Laoshi, your bottom line is a bit low."

(End of chapter)