was interrupted by the senior sister like this, and when Lu Zhou finished lunch, the lunch break was almost over.

After accompanying Lu Zhou all the way back to the experimental building of the Academy, and repeatedly telling him not to forget about the Russian delegation, Chen Yushan reluctantly waved goodbye to him, and then turned around and left.

Back in the office, Lu Zhou cleaned up the lesson plan that he had taken the time to sort out yesterday, asked Assistant Zhao to confirm the afternoon schedule, and then yawned and went to Teaching Building A.

There is a number theory class this afternoon, which is considered a major elective and has credits.

Originally, these courses were all taught with the help of He Changwen, a doctoral student he led, but seeing that more than half of the semester had passed, Lu Zhou thought about how he had to show his face, so he went to it himself.

I don't know if it's his delusion, but I always feel that the students sitting in the classroom spend more time staring at his face than staring at the blackboard......

After perceiving this, Lu Zhou couldn't help but feel a little frustrated.

I didn't expect that I hadn't taught undergraduates for so long, and my lecture level had regressed to the point where I needed to rely on my face to eat.

Recalling that when he was lecturing at Princeton University, the scene of children from other departments sitting in the corridor with small benches in their shoes, Lu Zhou was also embarrassed for a while.

It seems that in the future, if you have time, you will have to find more opportunities to attend classes in person......

It didn't take long for all four blackboards to fill up, and the bell rang for the intermission just outside the classroom.

Lu Zhou closed the book in his hand, looked at the students in the audience who didn't blink their eyes, and was about to make a summary of what he had said before, when he saw a line of light blue windows, which appeared in his field of vision.

【

Side quests completed:

(4) Alchemist: Produces 100 tons (100/100) of titanium alloy.

】

Already done?

So fast?

A trace of surprise flashed in Lu Zhou's heart, but he didn't show it on his face.

Clearing his throat, he stacked the lesson plans in his hand on the lectern, glanced around at the students in the classroom, and spoke.

"That's all for this class, let's take a five-minute break and continue later."

After that, Lu Zhou left the classroom, turned around and walked into the toilet next to the classroom, found a single room and squatted, silently recited the system, and entered a pure white system space.

Quickly walked over to the holographic panel, and as his index finger swiped across the screen, the task panel quickly appeared in front of him.

【

The second stage of "Earth-Moon Control" - "The Moon Stays Forever"

Spur:

(1) Overcrowding: More than 100 people are active on the lunar surface within 24 hours.

(2) Spark of the Future: The Large Hadron Collider on the Lunar Surface.

(3) Dig three feet into the ground: collect a total of 50 tons of rare earths from lunar soil.

(4) Alchemist: Produce 100 tons of titanium alloy. (Completed)

(5) Looking back at the home planet: establishing a semi-permanent Earth meteorological observatory in lunar orbit.

(6) Looking into the distance: Establish a large space telescope on the far side of the moon to make more detailed observations of the planets in the solar system and extraterrestrial star systems.

】

Looking at the "completed suffix", Lu Zhou couldn't help but sigh in his heart.

He started the whole project when he approved the funding, sat on the earth and waited for less than a few months, and the task was completed.

It's easier than hanging up.

The only fly in the ointment is that until the main quest of the second stage is completed, the rewards of the side quests will not be visible for the time being.

I don't know what benefits this side quest will bring him......

“…… Are there five branches left? ”

Looking at the few remaining tasks on the task list, Lu Zhou touched his chin.

The first one is very easy to solve, and it would be good to organize a hundred people to brush a wave with tourism or other means. It may not be easy to do last year, but now that the Queqiao has been completed, it is not too easy to solve this task, and you can make a lot of money if you can't say it.

There is also a third branch, which can mine titanium ore from the lunar surface, which can mine rare earth ore. As for the smelting of rare earths, it may be a bit troublesome, but the task only requires collection, and there is no requirement for smelting, and it should still be profitable to transport them back to Earth.

As for the other tasks, it can only be said that it is casual.

It's not realistic to complete all the branches, and it's not a loss for him to be able to complete more than half of them.

After exiting from the system space, Lu Zhou was about to get up from the toilet when he heard the sound of a faucet flushing outside.

Originally, he didn't care and planned to go out directly, but he happened to hear the two students outside say his name, so he sat back down and listened curiously.

As a professor, he was curious about what his students thought of him.

"Did you understand Lu Shen's lesson?"

"Half and half, what about you?"

The boy with glasses sighed and said, "One-third, hey, I want to understand too, but my strength doesn't allow it." ”

The man standing next to him washing his hands shook his hand: "Maybe this is the big cow." ”

Glasses Man: "Maybe! But when I thought that a big bull like Lu Shen was a single dog, my heart instantly balanced again, at least I still have a girlfriend. ”

"Haha, how do you know that people are single dogs, maybe they are just relatively low-key?"

The bespectacled man waved his hand with a "what do you know" expression.

"Come on, I can tell at a glance if I'm single or not."

At this moment, a voice with a little familiarity and a little smile suddenly floated from behind like a ghost.

"Really? Then you can teach me what to see. ”

The two people standing next to the washbasin turned their heads together, and when they saw Lu Zhou standing at the door of the single room, their faces suddenly looked like they had really seen a ghost.

"it, Land God!"

"Professor Lu?!"

Lu Zhou smiled and didn't speak, just looked at the two of them.

"Teach, Professor...... We ...... just now" was stared at by Professor Lu's smiling eyes, the bespectacled student scratched the back of his head, scratched his ears and cheeks in a hurry, and suddenly had an idea, and said in a hurry, "We were praising you for being handsome just now!" ”

Lu Zhou: "......"

MMP！

Am I deaf?

Also, does this thing need to be praised?

Not wanting to waste time with the two, Lu Zhou said with a straight face: "Hurry back to class." ”

"Yes!"

The two students immediately stood up straight and ran away without a trace.

Looking at the direction of the toilet door, Lu Zhou sighed faintly after a while.

Hey, he didn't realize it before, but now he finds that it feels really cool to be a professor.

But......

After all, did you set a bad example? What strange misconceptions do these undergraduates have about the profession of mathematician?

Speaking of which, his age is indeed not young, at least he can't be regarded as a teenager.

When I went home for the New Year this year, I was afraid that my father and mother should be anxious about his lifelong events.

“…… Forget it, let's wait two years and think about it. ”

Shaking his head, Lu Zhou put the question aside for the time being.

He wasn't exactly avoiding the question.

It's just that he hasn't figured out how to start a family and maintain it yet.

Research had taken up most of his time, and he simply didn't have the energy to play the role of a boyfriend, let alone a father......

Turning back to the classroom, Lu Zhou flipped through the lesson plan on the table and turned to the last page.

"Turn your textbook to page 47."

The sound of flipping books sounded in the classroom, and many students who had just read the contents of page 47 showed surprised expressions on their faces.

“…… The first half of the class is about the basics of number theory, and in the second half of the class, I will tell you something interesting, which is also a topic that I am studying. ”

As he spoke, he turned to face the blackboard, picked up the chalk from under the blackboard, and wrote four words on it.

[Riemann conjecture]

At the moment when these four words were written, there was a commotion in the classroom.

Lu Zhou patted the blackboard, motioned for the students to turn their attention to this side, and spoke in a clear voice.

"I'm fast."

"Listen carefully."