In another world, Lu Mingfei is learning card making.

For some reason, after Lu Mingfei answered "Which other Professor Xu is there?", Liu Miaomiao immediately closed her eyes, looking as if she was about to die.

But she stopped talking to him, and Lu Mingfei didn't seem to care much, enjoying the peace and quiet. The elevator slowly descended, and Lu Mingfei stared at the numbers, recalling the melodies he had learned.

—This is the benefit of 'spark learning'. Although it is not explained in the text of the website, once the spark is ignited, you will not easily lose focus when learning, and you will not forget what you have learned for a long time.

Of course, there are limits to how long one can remember something. There's a saying that people will do anything when pushed to the limit, except for mathematics, and the same applies here:

He couldn't understand those complicated symbols like applied mathematics and design mathematics, and even if he tried to learn and memorize them with Spark, he would forget them after a week of intensive memorization.

Lu Mingfei estimated that he would need to follow the development of mathematics step by step and gradually progress, and perhaps he could learn it.

Neither he nor the cardinal monk felt that he needed to delve deeper into the field of mathematics.

Mathematics is a bottomless pit, and perhaps there are gods flying in it, but since Lu Mingfei can't float up, there's no need to try to compete with those flying gods on stilts.

However, if one can memorize mathematical answers that are practically anti-memes for a week, then in the field of piano, where Professor Xu has already explained things extremely clearly, it is almost impossible to forget them.

—At least now, Lu Mingfei can vividly recall the piano fingering and music theory he learned two weeks ago (his perceived time, including a week spent at St. Mary's College).

Even during these two weeks, despite not reviewing every day, inspiration and ideas about the piano continued to spread uncontrollably in his mind.

Lu Mingfei felt that this "breakthrough of inspiration" was of a very high level—he even felt like he had become Talking Tom.

He remembered a scene in Tom and Jerry where Tom found a sheet of music, tapped two keys, and after a whole night of practice, he was able to perform for the king in the castle. Now he had that skill level too…

Okay, maybe it will be a little less. It might take four or five bursts of inspiration to achieve a similar effect to Tom's pondering in one night—in a sense, the difference isn't that big, after all, Talking Tom can probably only ponder for four or five hours in one night.

On the ninth floor, Lu Mingfei and Liu Miaomiao walked side by side for a while before parting ways at the fork in the road. Although Lu Mingfei found it a bit strange, he still followed the route he remembered. In room 911 on the ninth floor, Lu Mingfei politely knocked on the door, but Professor Xu Xiangkai, who opened the door, was dressed in a formal suit, as if he was about to leave.

"You're late today," Professor Xu said with a smile. "You haven't explored the building yet, have you? Come, let me show you around."

"Is there any point in even looking around this building?" Lu Mingfei thought to himself, but remained outwardly composed. He followed Professor Xu to the other side of the corridor.

……

When Liu Miaomiao knocked on the door, the sound that came out was not the usual intermittent or smooth melody.

This is the "Black and White Keys Art Center"—the name may be a bit common, but it's quite famous in this city. Putting aside everything else, the fact that it can keep operating a small-class piano training program with annual fees instead of per lesson, and not go bankrupt, is enough to demonstrate its reputation.

This place has a unique feature compared to other piano training classes:

The pianos here almost never stop during lessons. The teacher will choose a student to play on the grand piano in the center, while the teacher gives feedback and lectures.

So, if you open the door during class, music will drift out. It may be pleasant or unpleasant, but that's what makes this place unique.

But today, the music that had been playing non-stop here... suddenly stopped?

Liu Miaomiao took a deep breath, and suddenly the image of her classmate whom she had just met downstairs flashed through her mind.

The man casually talked about "Uncle Xu," and they exited the elevator on the same floor, but he turned in another direction.

Others may not know Professor Xu, but Liu Miaomiao does. She chose the Black and White Keys Art Center because of Professor Xu's reputation, since the teachers here are his students.

So... Professor Xu, whom she was so eagerly anticipating, was actually right next to this art center?

Liu Miaomiao pursed her lips slightly, but couldn't say anything. She knew that even if she rashly went to visit him, that 'Professor Xu' wouldn't give her a warm welcome—

Ultimately, that professor was already a full-time university professor with a guaranteed income regardless of circumstances, so there was no need for him to hold any training courses.

...But if that's the case, how did Lu Mingfei get involved with Professor Xu?

Liu Miaomiao sat with her classmates, waiting for the teacher to speak, but the teacher was unusually serious today—she even raised her wrist from time to time to check the time.

It was as if they were waiting for someone.

So the question is, who could be the person that the teacher is waiting for so earnestly?

Who else could it be?

Seeing Professor Xu, dressed in a suit, push open the door and enter, with Lu Mingfei following closely behind him, Liu Miaomiao couldn't help but sigh.

So what kind of background does this guy have that makes Professor Xu give him special lessons?

……

"Go, play a piece." Professor Xu pointed to the piano in the center and said bluntly, "If you can't play it well, just keep playing."

Lu Mingfei glanced at him, puffed out his cheeks, and sat down in front of the piano. On the piano were etudes for Grade 10 piano, Chopin's Impromptu in A-flat major.

It's not that he can't play, he just needs to think about how to play it—he only attended one lesson last week, learning the 'basics' such as sight-reading, fingering, scales, and arpeggios.

Should I carefully control my strength when playing? Or should I play according to my own skill level?

"So? You can't play it?" Seeing Lu Mingfei look at him, Professor Xu glared and raised his hand as if to hit him. "Didn't you practice properly at home?"

"No! You can play it!" Lu Mingfei shrank his neck, glanced at the sheet music, and immediately began to strike the keys.

As the music flowed, Lu Mingfei quickly regained his composure, completing the entire piece almost in one go. He jumped off his chair and ran to Professor Xu, ready to receive praise.

But the next moment, Professor Xu held his head in his arms—and the old man even curled his fingers and started to burrow and burrow on his head:

"Haven't you been practicing? Hmm? I'm asking you, have you been practicing this past week since you went back?"

"I practiced! I practiced! Teacher, I really practiced!" It was just practice in my mind—Lu Mingfei added a little, but didn't say it out loud.

"You practiced it in your mind, didn't you?"

Lu Mingfei looked up in surprise, meeting Professor Xu's eyes. After a moment of eye contact, he released Lu Mingfei's head.

"Never mind, your skill level hasn't declined, that's good." Professor Xu patted him on the shoulder and walked towards the door.