Gu Shiyi directly took Cheng Su and Lin Guo to the monitoring room, the teacher on duty was already off work, and the door was locked.

"The door is locked, it seems that there is no way", Lin Guo said dejectedly, leaning against the wall.

Cheng Su glanced at Shi Yi and "get away"

Lin Guo: "?"

Gu Shiyi smiled faintly at Cheng Su, "How do you know I have a way?"

Cheng Su put his hands together, "guess"

Gu Shiyi smiled lightly again, "Congratulations, you guessed right"

Cheng Su: "It's okay"

Lin Guo was shocked and looked at the key in Gu Shiyi's hand, "Gu Qiantable, it's okay, you!"

With a "click", the door was opened by Gu Shiyi, and the three of them slipped in.

In the monitoring room, all kinds of large and small screens were scrolling, Gu Shiyi sat in front of a computer desk, "What time was it lost?"

Cheng Su: "I don't know"

Gu Shiyi breathed a sigh of relief, "Then start from the test after the exam?"

Lin Guo thought about it, touching his chin with his fingers, thoughtfully, "Su Su, I remember that after the exam, I went back once, and it seemed that there was still something on your desk at that time."

"When did you go back?", Gu Shiyi asked her sideways.

Lin Guo thought about it again, "It's Friday after the exam, and I'll go back...... Saturday afternoon, yes, Saturday afternoon"

Gu Shiyi made an "OK" gesture and began to monitor the ......

"Ah~oh~", Lin Guo yawned a lot, Cheng Su glanced at her, "I'll come, you go and rest for a while"

"Well, then Susu, you look at it first, call me when you're tired~"

"Hmm", Cheng Su said, sitting down in Lin Guo's seat just now, staring at the computer screen, a little bit.

Lin Guo lay on the empty table beside him.

"This!", Gu Shiyi pointed to a surveillance in the corridor outside the classroom and said, Cheng Su looked over, and two thin figures walked into the classroom, looking at the two girls from the back, "It should be the two of them"

"Boom ~ boom", the monitoring screen on the computer once appeared two alternating parallel lines in black and white, and someone did it!

The corners of Gu Shiyi's mouth curled, "I still know how to do things, it seems that it has been premeditated a long time ago~"

Cheng Su glanced at him, "Will you?"

Gu Shiyi was just about to speak, but he turned a corner again and smiled slyly, "Guess again?"

Cheng Su: "Three ......"

Gu Shiyi: "?"

Cheng Su: "Two..."

Gu Shiyi immediately put away the smile on his face, his fingers tapped on the keyboard quickly, his expression was serious and serious, and as the last string of codes was typed in, Gu Shiyi pressed the enter key, and the originally destroyed picture was restored.

Gu Shiyi glanced at Cheng Su with disgusted eyes, "Little villain, you have a lot of enemies!"

Cheng Su: "...... I have a name."

Gu Shiyi thought for a few seconds and thoughtfully, "... Sue, Sue?"

Cheng Su glanced at him, too lazy to take care of it, his eyes fell on the computer screen, Gu Shiyi also put away the cynicism on his face, put his arm on the backrest behind Cheng Su, and leaned over to look at it together.

Cheng Su could see that his attention was all focused on the two figures on the computer, and he didn't notice the distance between the two at all......

Amazingly near!

In the video, the two girls are both with loose hair, about the same height, wearing white hats on their heads, and neat school uniforms......

From the back, it is completely impossible to see who it is.

Gu Shiyi pressed the mouse, the screen switched to the classroom, and the two of them walked to Cheng Su's seat in unison, one stood inside, the other stood outside, took out all the books on the desk and the homework in the drawer, glanced at each other, and left with a little proud steps.

"Tsk, I'm still wearing a mask", Gu Shiyi leaned back, pressed his index finger and thumb around his eye sockets, rubbing back and forth, and his eyes were a little tired.

"Backwards", Cheng Su said, Gu Shiyi's fingers quickly slid the scroll wheel on the mouse, and the screen once again switched to the picture of the two of them appearing outside the corridor.

Cheng Su's eyes narrowed, and his eyes were fixed on the movements and steps of the two people walking, and one of the girls walked a little inward......

Cheng Su remembered that the last time Li Xiaoxiao rushed out of the classroom, it seemed that he was also ......

A pair of dark eyes tightened.

Gu Shiyi looked at her sideways, "Have ideas?"

"Should", Cheng Su responded, got up and walked towards the outside of the monitoring room.

The back is cold.

Gu Shiyi reached out and slapped Lin Guo's back, didn't care about her, picked up the school uniform jacket on the chair, and followed......

In the girls' dormitory building, Gu Shiyi looked at Cheng Su's figure entering, paused, frowned, found a shady place to sit down, and looked in the direction of Cheng Su's entry.

In the dormitory building, Cheng Su looked for the door number next to each other, every time she knocked on the door, the people inside looked at her suspiciously, Cheng Su glanced around, did not find the person she was looking for, and continued to look down......

3rd Floor, 308 Dormitory.

Lan Xi, Li Xiaoxiao and Yu Min were tearing the stacks of books and scrolls on the ground page by page, their faces were a little hideous, and there was an evil smile on their faces.

"Hahaha... Throw all her books away and see how she learns!"

"Oops, I didn't do my summer homework~ That's a terrible thing than handing in a blank paper in the exam!"

"Ahahahaha..."

"She's unkind, don't blame us for being unjust!"

"That's it, relying on his own little appearance, he will be a prestige! Who can he show all day long?!"

Soon, the last remaining book on the floor was completely torn clean.

Lan Xi took out the prepared plastic bag, and Li Xiaoxiao and Yu Min put away the shredded paper.

"Is there a fire?", Lan Xi asked.

Yu Min took out a lighter from his pocket and handed it to Lan Xi, "Be careful, this is the dormitory"

"What are you afraid of, just such a pile of waste paper", Li Xiaoxiao said, took the lighter in Lan Xi's hand, squatted down and lit a piece of scrap of paper, the flame slowly ignited, and the more it burned, the more it burned......

The red firelight was reflected on the faces of the three people, which was a little hot, but the faces of the three people were smug and presumptuous, and the rows of teeth that were exposed also looked a little ugly.

Little by little, all the paper clumps turned to ashes......

The time was just right, Cheng Su pushed the door open unhurriedly, walked in, and pressed the record button with his fingers.

"Cheng Su?!", Li Xiaoxiao was the first to react, stood up, and glanced at Cheng Su viciously.

Lan Xi and Yu Min also stood up, a little overwhelmed for a few seconds, but then regained their calm complexion, and looked up at Cheng Su with their chests straight.

"How did you get in?", Li Xiaoxiao asked loudly, not looking like he had done anything wrong.

Cheng Su took a step forward, took his fingers out of his pocket, shook it, and the key on it was thrown in front of the three of them.