Waiting for You to Finish Class

"The component U1=UsinZ perpendicular to the magnetic field line and the component U2=UcosZ parallel to the magnetic field line, the latter does not cut the magnetic field line and does not generate induced electromotive force, the former cuts the magnetic field line, and the induced electromotive force generated is... ..."

Qin Yu calculated the cross-section of the wire on the manuscript paper, looked up at Chi Suola who was sitting next to him: "Do you understand?"

The girl hurriedly lowered her head when Qin An saw her, her face slowly blushed, and she let out a soft "um" from her throat.

Qin An put down his pen, and the people in the classroom had already left. It was Sunday, and the evening self-study was an hour earlier than usual, and it was not yet eight o'clock.

"Have you finished the topic? Qin An, you agreed to go have supper with us today."

Li Li's voice sounded, but his tone was not very serious, and he and Zhang Yunce were already standing at the door with their schoolbags on their backs, staring straight at Qin An and Chi Suola. It looks like a good show.

"Understood." Qin An stood up from his seat and took the schoolbag beside him.

"Miss Chi, are you going?" Li Li smiled again.

Chi Suola looked at Qin An, and saw that Qin An was walking forward with only her schoolbag on her back and didn't pay attention to her, but she still bit her lips and said, "I'll go...won't I disturb you?"

"No, no, let's go together, we will take you home later."

Li Li thief smiled and waved his hands, Qin An had already walked up to them, looking at the two people who were looking for trouble.

A few people walked towards the school gate together. At this time, most of the students had already left. The street lights at the school gate were very bright, and there were only a few parents waiting under the street lights to pick up and drop off students.

When walking out of the school gate, Qin An's footsteps suddenly stopped. There was a ginkgo tree outside the school that was said to have grown for a hundred years. To protect the tree, people built a circle around the tree that resembled a flower bed. At this moment, Qin An saw that the flower bed was squatting Standing alone, with his back bowed, his eyes were sharply staring at the school gate, like a hyena ready to hunt at any time. After seeing Qin An come out, he jumped off the flower bed and walked this way.

Today, he was alone without a dog, so he had remembered part of Qin An's warning to him.

Yan Shisan walked straight towards Qin An's group. Li Li and Zhang Yunce who were walking in front immediately gave way to let him go when they saw his aggressive appearance, but unexpectedly he stopped in front of Qin An.

"Don't think about leaving."

Yan Shisan didn't yell today, but his tone wasn't gentle either.

This is the same sentence every day, Yan Shisan raised his eyes and stared at Qin An, Qin An glanced at his friends who were enthusiastically watching, and raised his chin to them: "You go first."

"Your side..."

Li Li pointed to the unfamiliar Yan Shisan, who was half a head shorter than Qin Yu, and asked, "Who is it?"

Qin An stared at Yan Shisan's menacing eyes, and replied, "A little personal matter, I'll be there later."

After Li Li and the others left, Qin Yu looked at Yan Shisan squarely, his eyes were a little cold: "Are you finished?"

"If you give me money, I will never come to block you again." Yan Shisan said.

"Why should I give the money?" Qin An replied, there were some parents and students around, he walked into the dark place where the street lights couldn't reach with his pockets on, Yan Shisan followed like brown sugar, muttering: "You call If you are dead, the medical expenses will cost 600 yuan, so you have to pay for it.”

The street lamp penetrated through the gaps in the leaves, casting shadows on Yan Shisan's face, with mottled light and shade, Qin Yu stared at him, and rarely repeated his explanation: "I told you, I didn't hit anyone."

"People said, it was you who hit it."

Yan Shisan said firmly that his eyes were black and blue, and a boy of his age usually sleeps well and rarely has dark circles, but even so his eyes were still wide open.

Qin An stared at him silently for a few seconds, then took a quick step towards Yan Shisan, the distance suddenly pulled in, behind Yan Shisan was a wall, he couldn't retreat, he only raised his arms, his face was tense the tightest strings.

"You smile."

Qin An's tone was a little lost, and he wanted to see what he would look like without a straight face.

Yan Shisan was taken aback, and Qin An sized him up: "Smile at me, maybe I'll give you some money."

Yan Shisan's brows gradually frowned, and he looked at Qin An suspiciously, with weird eyes, but he didn't speak, not knowing how to deal with this scene.

"Don't you laugh? Don't laugh."

As Qin An was about to leave, Yan Shisan gritted his teeth: "Wait!"

Qin An had already taken two steps, Yan Shisan turned to face him and asked, "Are you telling the truth?"

Qin Yu raised his eyebrows and nodded at him.

"Give money if I laugh?"

Yan Shisan asked again, Qin An continued to nod, his eyes fell on Yan Shisan's stubborn and cold face.

Yan Shisan was still frowning, he took a breath, lowered his eyes, the reflection of his eyelashes fell on the dark circle under his eyes, then his brows gradually relaxed, the corners of his mouth stretched out, his neat teeth were exposed, his eyes were very displeased Staring at Qin An, as if urging him to accept his smile.

What a very insincere smile, Qin An turned around and left.

"You don't count."

Yan Shisan followed Qin An, and Qin An ignored him, even if he kept following, it was useless, just like a few days ago; but Yan Shisan could only keep following, this was his only way.

It wasn't until Qin An arrived at the barbecue shop that Li Li and the others sat at a table under the shed outside the barbecue shop, saw Qin An coming and waved to him, only to find that the child followed him just now.

"Don't worry about him." Qin An sat down at the only seat at the four-person table. There were several bottles of beer and a bottle of coconut milk on the table. Yan Shisan came over and looked around. He was not too close to Qin An. At an empty table closest to the road under the shed outside the barbecue restaurant.

But soon, the waiter walked towards Yan Shisan with the menu. Qin Yu could see Yan Shisan from an angle, and he looked at the waiter with a frown and said, "I don't want to eat."

The waiter smiled: "This is the consumption area, you can't sit if you don't consume."

Yan Shisan nodded, quickly stood up from his seat, retreated to the side of the road outside the shed, and stared at Qin An.

"Who the hell?" Li Li looked at Yan Shisan, who was exuding a strange aura, as if looking at a diorama. Before Qin An could think of what to say, Zhang Yunce suddenly said, "I seem to have seen him before."

Qin An's eyes quickly moved to Zhang Yunce.

Zhang Yunce made a "hissing" sound while recalling: "It seems... just recently... I thought he looked familiar just now..."

At this time the waiter was grilling them on the table, Zhang Yunce suddenly slapped his forehead, scaring off two skewers of mutton skewers on the waiter's plate.

"I remember!"

Zhang Yunce stood up excitedly, looked at Yan Shisan, and said loudly, "Are you the network manager of the Internet cafe?"

It's like recognizing a relative.

Yan Shisan looked at Zhang Yunce and replied, "Yes."

"I'll just say it! You look familiar, hehe!"

Zhang Yunce continued to recognize his relatives, and smiled at Yan Shisan, but Yan Shisan pursed his lips and did not return to him, staring at Qin An wholeheartedly.

"What is his relationship with you?"

Zhang Yunce turned his head and asked Qin An.

Qin An ate a piece of pork belly, and the old god put it in his mouth and swallowed it, then leaned on the chair and stared at Yan Shisan and said, "I'm a bodyguard."

"......what?"

The other three were at a loss, Qin An continued: "Insist on escorting me home for a week, rain or shine."

Qin An saw Yan Shisan's expression getting more and more serious, and when Li Li and the others asked about the details of Qin An's escort, Yan Shisan finally couldn't help but said loudly: "He owes me money!"

"???"

Li Li looked at Yan Shisan with a gloomy face and Qin An, and stood up to invite him: "Brother, do you want to come in and sit? It's fine to sit at our table."

Yan Shisan pursed her lips and stopped talking, but she couldn't resist Li Li who was getting closer and closer to her.Qin Yu had long discovered that Yan Shisan was a master who took the soft but not the hard, so under Li Li's mother-in-law's earnest tugging, he really pulled Yan Shisan to their table and sat down.

"Tell me, why does he owe you money?"

Li Li gave Yan Shisan a string of willow mutton, and his tone was so gentle that Qin An felt a little sick.

Yan Shisan sat on the plastic stool in a very neat posture, with his shoulders straight, holding the oily mutton in front of him as cautiously as if holding a certificate of honor, his expression was ashamed because of the enthusiasm of the other people. Not very comfortable.

Qin An glanced at Yan Shisan, the corners of his mouth slightly raised, he didn't express any opinion, it was fun to see Yan Shisan unable to resist, he even pushed the skewer in front of Yan Shisan towards him, Yan Shisan had an awkward expression, Qin Yu raised his chin at him: "You're welcome."

"Is it because he asked you to power level without paying?"

Zhang Yunce guessed that he had gone to the Internet Cafe of Insects before, and he had an impression of this boy because he was very good at playing games, would help others to level up, and his name was very special, like a number.

Yan Shisan shook his head, just in time to see Qin An staring at him, and met Qin An's gaze with very unfriendly eyes without any fear.

"The network administrator needs debt for power leveling, your business is quite complicated."

Qin An's tone was casual, but his eyes were full of scrutiny. Yan Shisan tightened his fingers holding the willow string, but kept his mouth shut and did not speak.

After a supper, Li Li and Zhang Yunce circled around the mysterious Yan Shisan. After asking, the topic of the three of them completely turned to the game. Most of the time, it was Li Li and Zhang Yunce who were asking and exclaiming.

"Wow! So there is something strange in that place too! No wonder I always die there!"

"Thirteen, have you played it many, many times? It's so clear."

"The new game? I always get killed in the first level. When will I find you, Thirteen, teach me!"

......

At the end of the day, Li Li and Zhang Yunce were still full of ideas, and they held Yan Shisan between them. It seemed that they were standing on the side of the road to help Chi Suola take a taxi, but in fact they wanted to ask Yan Shisan for advice.

Chi Suola looked back at Qin An frequently, and said in a cheerful tone: "My house is very close, and I can walk there. I really don't need to take a taxi."

Li Li and Zhang Yunce turned their heads to look at Qin An at the same time when they heard this, their eyes were full of meaning.

"It's getting late, let's take a taxi."

A taxi drove up in the distance, Qin An stretched out his hand to beckon, the taxi stopped on the side of the road, Qin An looked at Chi Suola: "Get in the car."

As he spoke, he stepped forward and knocked on the window of the passenger driver, and threw a 50 yuan note to the driver.

Qin Yu opened the car door for Chi Suola, the gentleman was alienated again, the girl hid the little disappointment in her eyes, and said goodbye to everyone with a smile.

"Tsk..."

After the taxi drove away, Li Li smacked his lips and squinted his eyes to look at Qin An: "Send the school flower home, how many people in our school want to send it can't be delivered, you don't have any interest in her, monitor?"

"No." Qin An answered bluntly, and they walked to the intersection. Li Li and Zhang Yunce were on the same road. They found Yan Shisan silently following Qin An, and they felt amused and confused.

"Thirteen, are you still following Qin An?"

Zhang Yunce asked, Yan Shisan nodded towards them with a straight face.

"Tsk... also... very good... well... then let's go, see you next time."

The two really didn't know what to think of Yan Shisan's persistence and Qin An's habit of being asked for debts. They were only more curious about the reason why Qin An owed the debt, but Yan Shisan didn't say anything, and Qin An couldn't tell.

After turning into the alley, Yan Shisan quietly followed Qin An for a while, and suddenly said, "Are you the squad leader?"

Qin An turned his head to look at Yan Shisan: "What?"

Yan Shisan looked at Qin An with bright eyes, looking at him in thought, not knowing what he was thinking about.The footsteps of the two were very clear in the quiet alley, one in front of the other, mixed with the sound of breathing.

"It's nothing... when will you pay it back?"

Qin An felt that he could hear some pessimism in Yan Shisan's words, but he hadn't analyzed the specifics yet.But Qin An finally stopped after Yan Shisan finished asking, he looked straight at Yan Shisan, this time there was not so much boredom and ridicule in his words as before, only calmness: "You made up your mind to ask me for money? "

Yan Shisan raised his head, looked at Qin An uncertainly, and nodded twice.

He has no place to live without money.

"You've been following me since I didn't give you any money?" Qin An asked again.

Yan Shisan lowered his eyes and thought for a while, then raised his head again: "One day you will find me annoying and annoying, and you can't stand me and send me away with money."

Qin An felt it was ridiculous, so he smiled: "How do you know I'm rich?"

Yan Shisan paused, and seemed to have had some ideological struggle before speaking: "You live in Lakeside No. [-], where rich people live."

As soon as Yan Shisan said this, Qin An's eyes turned cold: "Are you following me?"

Yan Shisan pursed his lips and remained silent. He was not good at lying, so he acquiesced.

"I don't have money to give you, but I can tell you who hit your friend."

There was no warmth in Qin An's eyes, and no mood to tease Yan Shisan. He never really sent Yan Shisan away just because he thought the boy was very funny, adding a touch of weirdness to his boring high school life. pleasure.

But now Qin An was impatient, he didn't know if Yan Shisan had done anything other than stalking, maybe he did or maybe he didn't, but after all, Yan Shisan was a stranger that Qin An didn't know much about.

"Who?"

Yan Shisan opened her eyes wide and looked at Qin An without blinking.

"Follow me."

Qin An turned around and turned into another unfamiliar alley, leaving Yan Shisan with a tall and straight back, Yan Shisan hurriedly followed.

At the end of this alley, there is a gravel road perpendicular to the alley. Walking past, there are steps going down parallel to the gravel road. After descending the steps, there is a row of very lush weeping willows. The three were brought to a river by Qin An.

There was a row of street lights beside the embankment. Yan Shisan looked up and could see Qin An's face clearly. Qin An was staring at the bridge across the river not far away. Yan Shisan also looked over, but saw nothing.

"It's them."

Qin An said that Yan Shisan frowned and tiptoed again, but he still didn't see the person Qin An said.

"look carefully."

Qin An reminded Yan Shisan that Yan Shisan approached Qin An and looked in that direction from his angle, only to see that there seemed to be some small red dots on the side of the bridge hole, like... cigarette butts, there were at least five hairs there. Lighted cigarette butts.

There are rows of temporary simple houses beside the bridge across the river, where workers from the surrounding construction sites live.

"Don't you want a debt? Go ask them."

Qin An glanced at Yan Shisan who was staring at that place, turned around and walked on the way back, but Yan Shisan would not provoke those people if he had any intelligence.

"really?"

Qin An heard Yan Shisan talking to himself in a low voice, followed by the sound of dragging footsteps on the embankment.

Qin An's footsteps were getting slower and slower, but Yan Shisan's footsteps were getting farther and farther away. With his back turned to Yan Shisan, Qin An thought that he should have walked towards the group of people.

Soon the footsteps stopped, and Yan Shisan's pretentious voice sounded: "On the 29th of last month, did you rob a boy at Wang's house and beat him?"

Qin An was already a little far away, but he could still hear the malicious voices of that group of people, using local dialects, using rude swear words, and perhaps accompanied by some impolite actions.

At this time, the mobile phone in the schoolbag suddenly started buzzing and vibrating, probably because grandma called to urge Qin An to go home.Qin An closed his eyes, opened his schoolbag and picked up his cell phone to answer the call: "Hey, grandma, I'm on my way back."

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