After listening to Old Tang's heartfelt words, Lu Zhou's heart was moved.

Sure enough, Professor Tang is the one who cares about himself the most!

But there is no way, who wants the system to throw that drawing to him? Don't waste it if you keep it!

After dinner, Lu Zhou went to the library again, and according to the book list given by the system, under the surprised eyes of the librarian, he borrowed all the relevant textbooks such as analytic geometry, ordinary differential equations, complex real functions, functional analysis, topology, and differential geometry.

Books on mathematics alone account for nearly one-third of the list.

If he can finish all these books, he can be regarded as having cleared the entire undergraduate course of the mathematics major.

Merely......

"Is 40 Focus Capsules Really Enough?" Looking at the capsule in the bottle, Lu Zhou was quite skeptical.

Shaking his head, he decided not to think about it for now, and what he had to do now was to do everything he could to complete the task of the system.

As for what to do when the capsules are consumed?

We'll just have to think about it later.

Unscrewing the mineral water bottle prepared in advance, Lu Zhou threw a capsule in his mouth.

Because of an experience, he quickly got into the groove this time......

……

In the early morning, a ray of sunlight shines over the eaves of the window.

The breeze blew through the curtains, listening to the sound of cicadas outside the window, Lu Zhou's eyelashes on the table moved, and he slowly opened his eyelids.

"Ah......h

Muscle aches all over the body, especially in the neck.

Last night, Xiuxian cultivated until the catastrophe, and he couldn't remember clearly when he fell asleep, but he remembered that he was really sleepy later, and he just wanted to take out his mobile phone to see the time, and he fell asleep with his head on the book.

These classrooms set aside for the graduate school entrance examination army have constant electricity at night, and no one came to wake him up after the summer vacation, so he slept like this until the next day.

Speaking of which, what time is it?

Lu Zhou took out the mobile phone that was about to run out of battery, opened the screen and looked at it, and secretly screamed that it was not good.

"It's already 11 o'clock...... Speaking of which, I have to go to tutoring in the afternoon. ”

After sitting in his seat for a while, he shook his groggy head and got up to go to the bathroom.

With a puff of cold water on his face, Lu Zhou felt that he was a lot more sober, returned to the classroom and sat down to rest for a while, gradually recalling yesterday's situation.

The conclusion of the last dose of the drug is that even after five hours, the residual effect of the drug will still work for a while.

In order to test the maximum duration of the focus capsule, Lu Zhou chose to try it in an environment without distractions.

The end result was unexpected.

He found that even after five hours had passed, the brain was still in a state of high concentration under the influence of residual effects, and could not stop at all without interruptions from the outside world.

It's just that this state of high concentration will also cause a lot of load on the brain, initially a slight headache, and then directly trigger the self-protection mechanism of the creature, and the whole person faints.

"It seems that the duration of the five-hour effect is not absolute, and if you hold it up, it is not a problem to even extend the effect by 50%. Especially in that state of being trapped to the extreme, after breaking through the critical point, the consciousness will be extremely clear...... As for the side effects, they seem to be no different from the side effects of staying up all night. ”

Talking to himself, Lu Zhou couldn't help but yawn again.

“…… It seems that the drug has to be combined with the liver explosion to achieve the best effect. ”

Lu Zhou moved his sore neck, closed his eyes and entered the system space, and activated the taskbar.

[Mission Progress 2/30]

It seems that the two textbooks "Linear Algebra" and "Analytic Geometry" have been passed by the system, and the next is ordinary differential equations.

If you keep up this momentum and solve this "bonus task" with 40 Focus Capsules, it shouldn't be a big problem!

……

Putting away the things on the table, Lu Zhou first went back to the dormitory, took a shower, and changed into clean clothes, then went to the school gate to call a Didi, and took the car to the address on the business card.

Summer in Jinling City is hot, and it's an anti-human kind of heat.

Anyway, the fare was reimbursed, so he didn't bother to sweat on the bus, so he took a taxi directly.

Soon, the car stopped in front of a community called "Bauhinia Garden", and after getting out of the car, Lu Zhou stood at the door and looked up, and couldn't help but sigh in his heart.

This community is indeed worthy of the name of the garden, and the repair is magnificent.

Moreover, this area is also a prime location close to the urban business district. To build such a community with such a high level of greenery in such a place, and it is a duplex apartment similar to a villa, I am afraid that the housing prices are unimaginably high. And only those so-called elites can live here.

Not to mention the calculation of the 100 millionth Mason prime, it proves that Bill conjectures to get a million dollars bounty, I'm afraid it's hard to buy a house here, right?

Lu Zhou glanced at the doorman, who was also looking at him, obviously seeing that he was not the one who lived here, and looked like he didn't intend to let him pass.

Lu Zhou looked helpless, made a phone call to Ms. Yang, and waited for her call to reach the guard's room, and then got the doorman's permission.

Taking the elevator upstairs, he walked over and rang the doorbell, when he suddenly heard the sound of falling things from behind the security door, as well as the faint sound of quarrels.

“…… You don't care about me at all, so don't pretend to be good for me! ”

Boom!

Through the security door, Lu Zhou could feel the muffled sound of the door slamming.

Finished......

This job doesn't look good.

Lu Zhou hesitated in his heart, thinking about whether to go back first today?

But just then, there was a sound of footsteps behind the door, and then the security door opened.

Naturally, it was Ms. Yang who appeared at the door.

At the moment of seeing Ms. Yang, Lu Zhou's expression was a little subtle surprised. Because of the expressionless calmness on this woman's face, he couldn't imagine that this person had just had a big fight with his daughter before.

Ms. Yang said in a calm voice: "Teacher Lu, there are slippers at the door, please come in first." ”

Lu Zhou's expression was a little subtle, but he still smiled kindly: "The teacher can't talk about it, just call me Lu Zhou." ”

"Where, the tutor is also a teacher, please here."

Through the entrance, Lu Zhou noticed that the living room was broken with a pile of glass shards, which looked like some kind of handicraft.

The door next to it was closed, and it should be Chen Yushan's cousin's room.

Ms. Yang did not leave him in the living room, but took him to the study next to him, and after motioning for him to sit down casually, she smiled lightly.

"Makes you laugh."

Somewhat embarrassing......

Lu Zhou smiled and didn't answer.

He only came here part-time and didn't want to get involved in other people's family chores.

Ms. Yang didn't say anything and took out a box of women's cigarettes.

"Do you smoke?"

"No." Lu Zhou excused himself.

Ms. Yang nodded, didn't say anything, put the lid of the cigarette case back, and then her eyes drifted to the wall clock on the wall, and spoke in a slightly tired voice.

"From now on, I will get off work from 1 o'clock at noon to 6 o'clock in the evening, and Han Mengqi will ask you during this time. Her books, test papers, and the tutoring materials I bought for her are all in this study, and you can mainly teach her mathematics. ”

"Is she okay with her current condition?" Lu Zhou hesitated.

If she had kept the door closed, the lesson would have been completely unfolding.

"No problem," Ms. Yang said, expressionlessly, taking out a key and gently placing it on the table, "This is the key to her room." ”

it?

This, is this really my own mother?

The problem is more serious, okay!

"I think ......"

"What do you think?"

"It's nothing ......," Lu Zhou shook his head.

What he wanted to say was that this would further intensify the conflict between your mother and daughter, but when he thought that as an outsider, he had no position to talk about other people's family affairs, because it might touch on a sensitive topic.

And he believes that it is impossible for Ms. Yang not to see this.

It's just that......

I don't know if she's helpless, or if she really doesn't care at all.

"I'll leave it to you." Ms. Yang stood up, "She will have a monthly exam before the holiday at the end of July, and if she can score more than 100 points in math, I will consider giving you a raise next month." If I can't get 80 points, I will consider changing to a tutor. ”

After speaking, she didn't wait for Lu Zhou to answer, and walked to the door of the study.

"By the way, one more thing I want to say, in order to prevent me from walking on the front foot, she will slip out on the back foot, and I will lock the security door of the house from the outside. You're okay with that, right? ”

“…… No comments. Lu Zhou shook his head.

Anyway, she came back at six o'clock, and she had no intention of going out during this period.

Merely......

Although I was introduced by your niece, is it really okay to lock a stranger in a room with his daughter?

However, her next sentence shattered all his doubts.

"In addition, I have about a dozen cameras installed in this house, and there are basically no dead ends. If you feel that your privacy has been violated, you can raise it with me in advance. ”

When she said this, although her expression did not change at all, Lu Zhou still read some kind of meaningful warning from that oppressive aura.

Really......

Or my own mother?

"I have no opinion."

Anyway, Lu Zhou has never had the idea or interest of doing bad things, he just came to work.

As for the issue of surveillance, the library and classrooms are full of surveillance, and he has long been used to such things as cameras.

It's just that when he heard Ms. Yang say lightly that she had installed more than a dozen cameras at home, he understood a little why the relationship between her and her daughter was so strained......