They're already in university, and the primary school system is only just starting out?

July 5th, Saturday, 9:7 AM.

Chen Lin slept until he naturally woke up, feeling relaxed and comfortable all over, with a lazy and pleasant feeling permeating his bones.

He drew back the curtains, and a long-awaited ray of brilliant sunlight instantly flooded the room, illuminating the dust motes floating in the air.

"The weather has finally cleared up."

Chen Lin stretched lazily, inwardly grumbling. The agonizing rainy season in Jiangdu was finally finally letting up for a while.

For the past week, the outside world has been either drizzling or overcast, with the air so humid it's practically dripping wet, completely wiping away any remaining energy.

His parents still have to go to work from Monday to Friday, leaving him all alone in the huge house, feeling like he's about to get moldy from being cooped up in this rainy weather.

He sometimes thinks that if students who study at universities in Shanghai or Nanjing return to Tianjin for summer vacation, their experience would probably be much better.

Of course, he wasn't really idle.

These past few days, aside from occasionally visiting his grandparents, he has spent most of his time working on Python.

After several days of dedicated research, he has basically figured out how to build a simple neural network using code. He has also grasped the basic functions of PyTorch, the most popular artificial intelligence framework at the moment.

It's a strange story.

For most people, the complex neural network underlying the large language model and the profound mathematical principles behind it are like a foreign language, the most difficult part to learn.

But for Chen Lin, who has the title of "little mathematician", matrix multiplication, singular value decomposition, softmax distribution, Bayes' theorem, gradient calculation, constrained optimization... these things are like looking at elementary school addition and subtraction. He can understand the principles and derivation process with just a glance.

For him, the real challenge was how to transform the clear mathematical logic in his mind into lines of precise computer code.

He feels that he has only just entered the field. Sometimes when he tries to optimize other people's neural network structure code, or tries to reproduce the original Transformer architecture proposed by DogeNet—the basic structure of ChatGPT that shocked the world almost three years ago—he still stumbles a bit.

However, Chen Lin was not in a hurry at all. Technical skills can be learned slowly.

Since receiving the enhanced title of "Little Financial Planner," he has found that his mindset has become unusually peaceful, and he is very easy to console himself.

No matter what troubles you encounter, just look at the constantly ticking countdown in your mind, and all your frustrations will disappear.

【小小理财师（已加强）：你的净资产每个月增长20%！（当前净资产：37921.132)(距离下次净资产增长： 638：23：55）】

638: 23: 54

638: 23: 53

……

Even though he came from a well-off family and had more than enough money of his own, the thought of the numbers in his bank account steadily increasing every month, like an inflating balloon, gave Chen Lin, a hoarder at heart, a simple and unpretentious joy.

Coming to his senses, Chen Lin walked out of the bedroom.

The living room was quiet; Mom and Dad had already left. A dust cover was on the dining table, and underneath was the breakfast left for him.

Two days ago, he handed the red envelope that his grandfather had given him to his mother untouched, so that she could discuss with his aunts what new furniture or appliances to buy for his grandparents' house with the money.

Judging from their appearance, the couple probably went to look at furniture today.

Chen Lin thought to himself, he had been back in Jiangdu for almost two weeks, and it was a rare sunny day, so he might as well go out for a stroll.

Just then, my phone in my pocket buzzed and a WeChat message popped up on the screen.

He picked it up and saw that it was Shen Yan.

Shen Yan: [Chen Lin, are you free now?]

Chen Lin: [It's convenient, what's wrong?]

Shen Yan: [I've prepared a PowerPoint presentation for my thesis defense, and I'd like you to take a look and see if there are any problems.]

The regional defense is the day after tomorrow. Although her school advisor had said that with the quality of their papers, a first-class national award was practically guaranteed, Shen Yan was clearly not the type to be complacent. She still diligently prepared a PowerPoint presentation for the defense.

Shen Yan: [[File: Yannan University "Higher Education Cup" Mathematical Modeling Competition Defense.pptx]]

Chen Lin smiled. A top student is indeed a top student; he is really meticulous.

He opened the document and flipped through it page by page.

It must be admitted that Shen Yan is indeed excellent. The entire PPT was logically clear, rich in illustrations, and visually appealing, showing that she had put in a lot of effort. She explained the core algorithm she had taught her very clearly in the PPT, with each step explained in detail.

Chen Lin: [Well done, no major problems] [On page 17, in the section about numerical optimization calculations, the range of one parameter could be made more precise. This would allow the model to converge faster and the results to be more stable.]

Shen Yan: [Okay] [I'll change it right away! Thank you so much!]

Chen Lin: [You're welcome]

Shen Yan: [By the way, I'll add you to a WeChat group later.] [The instructor said that if it's confirmed that I'll be going to Beijing for an offline exchange, the specific itinerary will be announced in the group.]

Chen Lin: [Okay]

Just as I was about to lock my phone screen and leave, another WeChat message popped up.

This time it's Yun Qing, and the profile picture is still that bright and cheerful smiling face.

Yun Qing: [Junior, long time no see (◕ᴥ◕)]

Chen Lin raised an eyebrow.

Chen Lin: [Hi senior, I'm back in Jiangdu for the holidays!]

Yun Qing: [When are you going back to school?]

Yun Qing: [I saw the post on the school forum last month] [You're something else, quietly stirring up another big news [eating melon emoji]]

Yunqing: [Has your singing improved again?] [When you go back to school, will you let your seniors hear your singing again? (◕‿◕✿)]

Chen Lin could almost picture Yun Qing smiling sweetly on the other end of the phone.

He gave a perfunctory reply, but in his heart he was thinking that when school started, with so many people and so much to do, he would probably forget about it long ago.

Immediately afterwards, Yunqing sent another short video.

Chen Lin clicked on the video, which showed the school band's new rehearsal room. Yun Qing, wearing a sports vest and shorts and with her hair in a high ponytail, was singing passionately into the microphone.

Sunlight streamed through the window, bathing her in its glow. Sweat trickled down her face, and she moved with effortless grace, radiating more energy and vitality than when I last saw her at the bar, her charm captivating.

After reading it, Chen Lin sent her a thumbs-up emoji.

Yun Qing: Thank you.

Chen Lin smiled and was about to completely exit WeChat when his finger paused on the screen.

His gaze was drawn to an inconspicuous profile picture in his contact list. On that profile picture was a small red number "1".

It's Sun Yu.

Chen Lin slapped his forehead.

broken!

I was in such a hurry when I left that I was so focused on saying goodbye to my roommates that I completely forgot about this guy and didn't even tell him that I was leaving Tianjin!