Chapter 19: 018

018 "Pay Cash, Get Goods!"

"You're working overtime? What the hell kind of overtime is that!"

"No choice. Tomorrow the branch leadership from the city is coming to inspect our work; everyone in the bank has to stay late." Fang Qingye sat in his chair, holding his phone, and lazily replied.

"Damn it... your senior sister, the branch manager, won't even grant you extra leniency? Today is supposed to be your highlight moment." Song Dahai complained over the phone.

"Alright, whether I go or not doesn't matter. You guys eat well, drink well, and have fun." Fang Qingye smiled.

"Rest assured, we won't let Jiang Chen off easy!"

"Good then, bye." Fang Qingye hung up the phone after speaking, a faint smile appearing on his face.

He didn't really want to go.

Even if he worked overtime, it probably wouldn't last too long; finishing work at five, attending a meeting, he could still make it to the hotel a bit later.

With so many classmates, he would inevitably be drunk and knocked out tonight; there was no need to show off again.

Sure enough, before seven, the overtime ended. After eating the boxed lunch ordered by the leadership, Fang Qingye rode his small scooter straight home and started working on the modeling.

First was data preprocessing. The Dongguan Girl had sent a huge pile of investment data from a certain investment bank; this data had to undergo cleaning and transformation.

So-called data cleaning refers to handling missing values and outliers; data transformation refers to standardization, normalization, and other dimensionless processing of the data.

Fang Qingye brewed himself a cup of tea and sat by the computer to study it himself.

With something to do, time passed quickly; soon it was past ten. Fang Qingye stretched.

Rest; do it tomorrow.

Stay up late working?

Dream on.

He had done enough as a beast of burden in his past life; he didn't want to be that tired in this life.

Play a game first, then see.

As soon as Fang Qingye opened Warcraft, his phone rang. Seeing it was Song Dahai, he casually picked up, and immediately Song Dahai's loud voice came through.

"Holy crap! Ye Zi, you didn't come tonight, you missed out big time! Twelve whole tables of classmates; everyone went crazy drinking!"

Fang Qingye felt a bit strange upon hearing this. "Twelve tables? That's nearly a hundred classmates; how could so many show up?"

"You don't know? Several classmates working in the city and neighboring counties rushed back. Also, some classmates who hadn't joined the group heard about this and eagerly joined in. What a lively scene... It's been several years since high school graduation; the class reunion has never been this complete!"

"Jiang Chen must have spent a lot, right?" Fang Qingye smiled.

"You bet. Just Dream Blue alone, they drank a whole five cases! Jiang Chen's face turned green in the end. Originally, after drinking, they were going to go karaoke, but this guy made an excuse that he was too drunk and actually ran out the back door of the hotel! Haha... But you can run away from the Monk, but you can't run away from the Temple! This karaoke, he's definitely paying for! Even Jesus couldn't stop him!"

Holy crap...

He really got drunk; he's even using lines from plays.

"Alright, alright, let's see how you stir things up."

The two chatted for a while longer before Fang Qingye hung up the phone.

It wasn't just Song Dahai calling; they were all drunk and excited with nowhere to vent. Some even said they wanted Fang Qingye to teach them stock trading, but he firmly refused.

"Teach what? I just took a gamble; I got lucky and won. My stocks are still losing money to this day."

"You're asking me if it will rise or fall later? I can't say for sure, really can't be certain. Once I break even, I'll get out quickly."

By the time Fang Qingye finished chattering with these drunk classmates, it was already eleven o'clock.

Forget it, won't play the game either; take a shower and sleep.

The next day, Fang Qingye went to work on time, but what angered him was receiving another notice from the department: originally, the city branch leadership was coming to inspect work, but due to an urgent matter, the leadership suddenly canceled and would come another day!

He had wasted half a day working for nothing yesterday.

But that's how the workplace is; the leadership can arrange their schedule at any time, but the people below cannot.

What's most infuriating is that you work hard preparing all day, the leadership comes down for research, glances over things for just five minutes, and leaves. That's so frustrating...

Fang Qingye was already used to it; since no one was coming to inspect, he could busy himself with his own affairs.

Dimensionless processing, descriptive analysis, then start formal modeling.

According to the requirements, Fang Qingye was building a prediction model. Common methods include time-series forecasting, regression analysis for forecasting, machine learning for forecasting, Markov forecasting, or combinations of other methods.

Adopt regression analysis for forecasting...

After working hard all day again, the mathematical model was built; the next step was model evaluation.

This step is also very important; appropriate evaluation metrics can accurately measure the model's performance. It seems there's no time during the day; let's do it tonight.

By evening, Fang Qingye continued to finish his work. He decided to use Mean Squared Error (MSE), Root Mean Squared Error (RMSE), and other metrics for evaluation.

Hmm...

The results are not bad.

Done!

Fang Qingye logged into QQ.

Several groups inside had unread messages, but he didn't pay attention. The little penguin kept jumping; the flashing one was the avatar of Nakamura Chiyo in a sailor suit.

It was the Dongguan Girl's.

Every time Fang Qingye logged into QQ, he saw her avatar flashing, but he usually ignored it, unless, like today, there was serious business to discuss.

Fang Qingye clicked on the Dongguan Girl's avatar, and immediately a huge pile of messages appeared inside.

"Husband, are you there?"

"Husband, your wife misses you. Although you are not by my side, we are still in the story. Even if I am not by your side, you are still my protagonist."

"Hey, you rascal, is that math model of yours done? If not, I'll do it myself!" Followed by a group of bloody knives.

Looking at this messy language, Fang Qingye sighed and replied: "Finished writing it."

The other person's avatar lit up immediately, and a message arrived instantly.

"Husband, you finally came. Your wife misses you to death."

So soon?

Fang Qingye suspected this guy seemed to be clutching a phone or keyboard at all times?

"Think about your sister," Fang Qingye replied without the slightest courtesy.

"But I don't have a sister; I have a female cousin. Do you want Er Huang and Nu Ying?"

The "shy," "shy" expression.

Fang Qingye felt truly speechless: "If you keep talking nonsense, I'll log off."

"Alright, alright, you say you've finished writing it?" Dongguan Girl immediately became serious.

"Mm, I'll send it to you. Money first, goods second," Fang Qingye reminded.

"Rest assured, since you're my husband, how could your wife cheat you?"

Fang Qingye said nothing more and transmitted the completed document.

After the other party received it, there was no reply for quite a while; Fang Qingye wasn't anxious, knowing the other party was conducting a numerical model evaluation.

He poured out the tea that had lost its flavor, brewed a fresh cup, and drank it slowly.

About twenty-some minutes later, the other party's avatar began flashing again.

"Written well, husband, you're so awesome."

"Don't get too familiar; pay up!"

"OK, send over your account number; I'll transfer the money to you immediately."

Fang Qingye sent his salary card account number, along with his real name.

"Husband, your name is Fang Qingye? Such an artistic name; your father must be a teacher?" the other party sent a line of text with a smile.

He guessed correctly.

His father, once an artistic youth, had given him this name, but Fang Qingye didn't want to dwell on it.

"Transfer the money!"

This time, after five minutes, Fang Qingye's phone received a notification message: 200,000 RMB had been transferred into his account.

Fang Qingye's heart finally settled.

He had truly worried the other party would bluff him, pretend to examine the model after receiving it, then log off and leave, making a clean getaway.

Fortunately, this Dongguan Girl still had credibility.

Fang Qingye replied "Received" on QQ and prepared to log off when the other party suddenly sent another line: "Do you want to build another numerical model?"