The break between classes was only more than ten minutes, and Chen Yiyan and the others had to listen to another class that Professor Zhang Sen had originally taught today. This class is also in business administration, but this one is an elective course.

The music bell rang again, and this time it was Teacher Wu Qian who replaced Professor Zhang Sen. When Teacher Wu Qian walked through the front door of the classroom, she nodded to Chen Yiyan and his party who were walking over, and all of Chen Yiyan's actions this time were in contact with the school.

"Hello classmates, I am your substitute teacher for this elective course this semester, my name is Wu Qian, Wu is Wu from Koutian Wu, and Qian is Qian from Caoxi." Ms. Wu Qian was meeting the students for the elective class for the first time, and she wrote her name on the blackboard and continued: "This is the first time I have met you, and I have the list here. I'll read the name in a moment, and you raise your hand to report. ”

After writing her name, Teacher Wu Qian picked up the list of students she brought over and began to roll call, and Chen Yiyan and several people watched from behind the door.

"Ping, I asked...

"Shh The police officer who had gone to inquire about the students pointed out by Chen Yiyan came behind Ji Ping and was about to speak, but was interrupted by Chen Yiyan. Ji Ping also gestured to his eyes.

"Gu Jiali."

"Here." Wu Qian followed the voice.

"Hmm. Zhang Aihua. ”

"Here."

There were forty-six people in the elective class, and I was in the office today. Chen Yiyan and Ji Ping had seen the list of students and knew the specific number of students. But Chen Yiyan counted that there were only forty-two students present.

"Gui Shuyi." Teacher Wu Qian looked up at the students below, and this time there was no sound of registration.

"Gui Shuyi? Is it called Gui Shuyi? Teacher Wu Qian asked again.

After about five seconds, Teacher Wu Qian spoke: "Although Teacher Zhang Sen can't teach you a lesson, this class has not been canceled, and you still have to come to class." ”

Wu Qian called several names one after another, and someone replied. There are more than a dozen names on the list, Teacher Wu Qian continued.

"Li Lan?" Teacher Wu Qian's voice was mixed with a trace of doubt, and Chen Yiyan heard it.

"Teacher!" The previous female classmate who was asked for her name spoke.

"You say." Wu Qian looked at her.

"Li Lan, she's in the hospital, teacher." The female classmate continued: "She was the one a few days ago, and now she is in the hospital. There are no fake strips. ”

"Okay, I got it." Wu Qian nodded. Chen Yiyan at the back door touched his chin and his expression was a little playful.

"Yuan Jie." Again, no one replied.

"Yuan Jie is also in your class, do you know where he went?" Li Lan and Yuan Jie plus the previous female classmate and the other classmate after Yuan Jie's name are in the same class, Wu Qian looked at the female classmate who answered before and asked.

"I don't know." The female classmate replied.

"Okay, Dong Hua?" There was still no response from below.

"There are four people in your class, and two of them don't come to class, so please inform them next time, if you don't come to class and don't have any reason. I'm not going to pass it. Wu Qian did not mention Li Lan.

"Okay teacher, I know, the two of them are in the same dormitory, I'll let them know when the time comes." The female classmate agreed.

The identities of the four students who did not come to the elective class have been revealed. Chen Yiyan gave Ji Ping a look, and Ji Ping understood: "A few students who didn't come just now, you go and find out the identity for me, Xiao Li, what were you going to say just now." ”

The police officer who was about to speak but was interrupted by Chen Yiyan spoke: "The student who sat in the middle of the first row is Zhao Hongda. He said that he didn't know about Teacher Zhang Sen, and he only cared about studying. He didn't notice anything strange about Mr. Zhang Sen recently, and asked me not to delay him to take elective classes. The police officer briefly recounted the content of the question, which was similar to Chen Yiyan's conjecture.

"The student by the window was indeed the same as Advisor Chen said, he said that he had fallen asleep before, but he told me that he felt that Mr. Zhang Sen had behaved a little strangely before." The police officer who arrived after the roll call of the elective class saw Chen Yiyan and Ji Ping looking at him, and he continued: "He said that Mr. Zhang Sen usually does not delay class, but once a few weeks ago. And every time I go to the bathroom, I can see Mr. Zhang Sen smoking. The police officer's words were interrupted by Chen Yiyan.

"Alright, he's probably just killing the electives. When you go back to the game later, just show your record to your draw. Chen Yiyan patted Ji Ping's shoulder.

The police officer got Ji Ping's consent and looked at Chen Yiyan: "Okay." ”

"Keep looking. I'm going to help you find out the identity of this student who didn't come. Chen Yiyan spoke.

"I'll go with you, you stay and observe these students, and if you feel suspicious, you leave them for questioning." Chen Yiyan came up with this strategy to save a lot of time for questioning, and if there were no suspicious people in the next four students who wrote threatening letters, then they would need to question all the students in the class one by one.

After leaving the teaching building, the two went to the teacher building.

"Why don't you go to the deceased's office?" Looking at Chen Yiyan, who continued to go upstairs, Ji Ping asked.

"What are you doing in the office of the business school? The four students were from the College of Foreign Chinese. Chen Yiyan continued to walk upstairs.

On the fifth floor, the entrance to the office of the Outer Chinese College.

"Knock knock." There was a knock at the door.

"Please come in." A woman's voice can be heard from inside the office.

Chen Yiyan opened the door of the office: "Hello, I am Chen Yiyan, a police consultant, and this is a police officer from the police station of the first district, Ji Ping." We are here to investigate the case of Li Lan. ”

"Li Lan? Didn't the police come and ask a few days ago? The teacher from the Foreign Chinese Academy asked.

"Oh, that's right, we think there is something else hidden in this case, so we want to take a look at the detailed list of students." Chen Yiyan spoke again.

"Oh, then you wait a minute, Li Lan, it's the third class." The female teacher rummaged through the desk: "I gave it to your colleagues last time, this is my last one, you will return it to me after reading it." ”

Chen Yiyan took over the detailed list of students. 'Li Lan, Building IV, 307. Dong Hua and Yuan Jie, Building II, 504. After scanning the list, Chen Yiyan returned the list to the female teacher: "Thank you for your cooperation." After speaking, he pulled Ji Ping out of the office. What else to look for? Odd. The female teacher muttered to herself as she watched the two leave.

Outside the office, "No, why are you here to investigate Li Lan's case." Ji Ping looked at Chen Yiyan: "Do you think these two things are related?" ”

"Not sure, but that's what I thought." Chen Yiyan spoke his mind.

"Then there is another one, what about Gui Shuyi?" Ji Ping remembered that there was another student among the students he bought.

"Gui Shuyi's name is a girl as soon as she hears it, and the clue now is not that the murderer is a man. If you want to check, you can do it yourself, and I won't check this person. Chen Yiyan said as he went downstairs.

"I'll send someone to check in later, are you going to the student dormitory now?" Ji Ping asked after Chen Yiyan.

"Yes. I'll go see what the situation is with Yuan Jie and Dong Hua. ”

In the lobby of Building 2 of the school dormitory. "We're the police, we're here to investigate the case." Ji Ping took out his ID from the pocket of his police uniform and gave it to the aunt in charge of the hall.

"You're here to investigate Mr. Zhang's case, I've heard it all today. How do you know who's doing it? The aunt said after reading the documents and returning them to Ji Ping.

"I'm sorry Auntie, we're investigating the case now."

"Oh, well, you guys go in, you want me to follow you?" The aunt looked at the two.

Chen Yiyan, who didn't speak, spoke: "Auntie, you can give us the key to 504, thank you for your cooperation." ”

“504？ Oh good. The aunt took down the key to 504 from a pile of keys hanging on the wall next to her and gave it to Chen Yiyan: "You go and check." ”

"Why did you tell Auntie about the room you want to check? And the two of them are not in class, they should still be in the dormitory. Ji Ping, who went upstairs, asked Chen Yiyan.

"You look at that aunt, you just want to know some gossip. If you don't tell her a little, she'll ask herself. It's better to tell her a little bit and let her cooperate with her with peace of mind. Secondly, even in the dormitory, it is possible that the other party will not open the door, or will not be in the dormitory at all. Chen Yiyan replied.

Ji Ping didn't speak again. Soon, the two arrived at the door of No. 504.

Ji Ping knocked on the door. "Who?" came a man's voice from the dormitory.

"We're here to check the hygiene." Chen Yiyan spoke first.

"Oh, you wait." The man in the dormitory thought it was a surprise inspection of the dormitory's hygiene.

Chen Yiyan and the others waited outside the dormitory for a long time before the door of the dormitory opened.

"Come in." The male classmate who opened the door said.

"Okay." Chen Yiyan pushed open the door and entered the bedroom.

"Police?" The male classmate saw Ji Ping wearing a police uniform behind Chen Yiyan.

"Yes, actually, we are here to investigate the case." Ji Ping looked at the male classmate.

Chen Yiyan was observing the bedroom that had just been cleaned.

"What's your name?" Ji Ping asked.

"Yuan Jie." The male student replied.

"You're taking Teacher Zhang Sen's elective course, right?"

"Yes."

"Then you, why did you skip class today?"

"This." Yuan Jie touched his head, and at this time, Chen Yiyan saw the computer with the game window open on the side: "This is your computer." ”

Yuan Jie turned his head and looked at the computer that Chen Yiyan pointed to: "Yes, it's my computer." Hey, I'm playing a game, and then I was supposed to go with someone in my dorm. He took a leave of absence in the afternoon, so I didn't want to take electives either. ”

"Leave? Is it Dong Hua? Ji Ping still remembered the name of another male classmate.

"That's right, it's Dong Hua. He took a leave of absence in the afternoon and went home. Yuan Jie replied.

"Do you know his home address?" Ji Ping asked again.

"I only know that his family lives nearby, but I really don't know the specific address."

"That's him." Chen Yiyan looked at the desk on the other side. There were some textbooks on the table with Dong Hua's name signed on them.