Yi Cheng used Shu Yu Xia Rong's mobile phone to find his father's contact, and then sent him a message:

[I'm tutoring at my classmates tonight, and I won't be able to go home until tomorrow.]

It's a female classmate, you can rest assured. 】

Shu Yu Xia Rong's mobile phone is fingerprint unlocked, otherwise I really don't know what to do.

If this [father] has no special meaning, it should be Shu Yu Xia Rong's father.

In order to convince Shu Yu Xia Rong's father, Yi Cheng attached a photo of his aunt by the way.

"Why should I cooperate with you?" The aunt was very unhappy with his requirement to dress up as a high school student. "Do you have any special fetishes?"

"I thought I could easily handle a high school student at your age......"

"What stupid thing to say, come, shoot. Just shoot. ”

My aunt is very arrogant and very cooperative.

After sending the photo of her aunt, Shu Yu Xia Rong's father called over.

The call was answered by my aunt.

After hearing her aunt's voice, Shu Yu Xia Rong's father finally agreed.

"Your voice is much younger than it looks. So I'm relieved. ”

The aunt wanted to crawl down the phone line and hack him to death.

After that, it was handed over to Shu Yu Xia Rong himself.

Yi Cheng instructed her to only say no more than 3 words per sentence.

Shu Yu Xia Rong is usually a cold image, and everyone who talks to her can't get a response from her.

[Then you should be safe at night and don't play too late.] 】

"Oh."

Shu Yu Xia Rong overfulfilled the task, and she solved the problem with just one word.

The father didn't believe that his daughter would study hard.

Ay......

Yi Cheng let out a sigh.

The most basic trust between people is gone.

"Hmm...... I think her dad was right when he said that young people should be safe and don't play too late. The aunt clasped her hands on her chest and looked at Yi Cheng with charitable eyes.

"Okay, we'll take care of it."

Yi Cheng took Shu Yu Xia Rong's hand and returned to the room.

“oh，my god！”

The aunt patted her forehead.

Since the teacher came to her door yesterday, she had given up the [admonishment] option.

Her only hope now -

That is, the eldest nephew should not be hacked to death with a kitchen knife.

……

After doing this, Yi Cheng made a special call to Bai Jingxue.

The other party didn't answer.

So he used his and Shu Yu Xia Rong's mobile phones to send a WeChat message to Bai Jingxue, explaining that the two of them were indeed just classmates, and nothing else.

After a while, Xiaobai replied with a message.

[What do you have to do with me, I'm not your person. 】

[Didn't we agree, whoever falls in love first has to show his lover to each other. Yi Cheng replied.

[Hmph, you remember. 】

So don't be angry. 】

[What do I have to be angry about. Bai Jingxue replied with a roll of her eyes, [Forget it, I seem to have something like you. I'll talk about it tomorrow, I'm going to sleep now. 】

[Hmm.] Good night. 】

[Good night. 】

Yi Cheng put away his phone.

It seems that Xiaobai should not be angry.

However, he sat on the bed and thought about it carefully, why was Xiaobai angry?

Do you feel like you've failed Mo Xiaotian?

But Mo Xiaotian and I are really innocent.

Can't figure it out, can't figure it out.

……

Sure enough, the next day, Shu Yu Xia Rong behaved very cold to Yi Cheng.

Yi Cheng didn't say a word to her.

It's as if the two of them are strangers.

Bai Jingxue saw it in her eyes, and she couldn't bear it.

"You fell out with Shu Yu Xia Rong?"

"What?" Yi Cheng did the question seriously and didn't raise his head.

"Didn't you study together last night?" Bai Jingxue looked at Shu Yu Xia Rong in the distance suspiciously.

The other party is listening intently.

"We were just ordinary classmates." Yi Cheng said lightly, "She doesn't know me well. ”

“……”

"No, I don't want you to become a passerby because of me. At least we can still be friends, can't we? Xiaobai looked at him with complicated eyes.

Have mixed feelings.

"Oh, we were in an ordinary relationship, not because of you."

Yi Cheng pushed the notebook in front of Xiaobai and interrupted the topic.

"Can you tell what's going on with this?"

"Huh......?" Bai Jingxue glanced at it, and there were two matrices written on the paper:

【0.1 0.2 0.3】

【0.3 0.5 0.4】

【0.6 0.2 0.1】

The other one is:

【0.3 0.2 0.3】

【0.4 0.1 0.4】

【0.6 0.5 0.7】

"Damn, what the hell is this?"

"Okay, I see." Yi Cheng took the notebook back.

He bit the shaft of his pen and fell into deep thought.

Yesterday, the matrix was the first, and today it has become the second.

He was able to calculate the relationship between the two as follows:

Matrix 1x Matrix A = Matrix 2

Then we get matrix A as:

Multiply matrix 2 with the inverse of matrix 1

……

But that doesn't mean anything.

There are many ways to transform from matrix 1 to matrix 2.

If matrix 1 represents Ran Bingqing and matrix 2 represents Shu Yu and Xia Rong, then how did they transform into these two matrices?

Yi Cheng disassembled the names of each of the two people, and then converted them using several different encodings......

Still confused.

More samples are needed.

And preferably the kind that is reproducible.

Otherwise, it would be difficult to draw a pattern, and he didn't have much time left, plus only 5 days including today.

……

I came home from evening self-study.

There was a boy standing at the door.

Yi Cheng glanced at him, silently took out the key, and decided to ignore him.

Don't call me, don't call me, don't call me......

"Servant, I want sweet and sour pork ribs."

Damn, Yi Cheng covered his face in pain.

When the two of them entered the house, the aunt was petrified on the spot.

"This is my classmate." Yi Cheng introduced, "By the way, what's your name?" ”

"It seems to be Murong Jun. I've heard people call me that. Murong Jun explained as he flipped through his schoolbag.

took out the notebook and looked at it, and sure enough, the signature was Murong Jun.

"Well, hello auntie, my name is Murong Jun."

"Hello, hello."

Auntie's brain has stopped thinking.

"Let's go."

Yi Cheng took Murong Jun's hand, and the two of them entered the bedroom.

……