"That teacher's surname is Chen, and she has been dead for many years! I don't understand, what are you asking her for?" came an impatient man's voice on the phone.

The man is the head of the office of the Anju Aviation College, who has been working at the school for more than 20 years, and can be said to be the person who knows the situation of the school's teachers best!

"I'm sorry to bother you so late, but ......," Li Xiaoxian patiently explained, "This is an important case related to us, and I hope you can help us!"

"It's not that I'm bothered, but you're doing this a bit too much, isn't it?" the director still didn't give up, "What kind of case can an old teacher who has been dead for many years be involved in?"

"Are you mistaken?"

"Hey," at this time, Zhou Tang suddenly spoke, and he said unceremoniously to this person, "We didn't call the leaders of your entire school to the police station for questioning, it's already very polite!"

"I might as well tell you that your school has been involved in several murders! The case is urgent, otherwise, do you think we have enough to eat and support you, and call you in the middle of the night?

"I warn you, if you don't cooperate with us well now, it will be hindering official business, if you really have a kind, then put down the phone now, don't say anything, and see what your Principal Yang will do with you later?"

"No, I didn't mean that," Zhou Tang immediately changed his attitude and quickly explained, "I didn't discooperate with you, I just said that Teacher Chen has been dead for many years, what case can she have?"

"What year did Mr. Chen die?" Zhou Tang asked.

"Hmm...... I want to think about it......" The director recalled for a moment, and said, "It looks like '02 or '03......, right?" I...... I'll have to look it up, I really can't remember it clearly......"

02...... 03......

Zhou Tang and Li Xiaoxian glanced at each other, and a strange look flashed in their eyes, Jin Xiaoling disappeared in 03, that is to say, the murderer must not be this Teacher Chen!

"So......" Zhou Tang asked, "Teacher Chen hadn't retired at that time?"

"No," replied the director, affirmatively, "she has just retired! maybe not even half a year, right......?" It was some kind of acute cardiovascular disease that died very suddenly!"

Already retired......

Zhou Tang silently calculated, the old teacher should have retired and passed away not long after teaching Jin Xiaoling.

"That'...... Apart from Teacher Chen, who else is taking care of the physiology classroom?" Zhou Tang asked again.

"Hmm...... Physiology classroom, that's a not very important course, I want to think about it......" The director recalled again and replied, "Because that building was too far away from the main teaching area, the whole building was basically converted into a warehouse at that time, leaving only one or two classrooms, and the physiology classroom was one of them......

"Hmm...... Teacher Chen has been working there for six or seven years, and even I don't know about her situation before, anyway, when I go to work, only Teacher Chen is in charge......

Later, Teacher Chen passed away, and the school transferred a few teachers to the school, but all of them couldn't stand the desertion of the building, and gradually no one was willing to teach......

"Later, the school was restructured, and we established a special classroom for medical care, and the physiology classroom was basically abandoned!

The school wants to build a gymnasium there, but the old building is not large enough, and it is rectangular and needs to be demolished as well.

"However, the demolition was not easy to handle, so it was finally put on hold......

"I want to ask," at this time, Li Xiaoxian thought of a question and immediately asked, "Since Teacher Chen was very old at the time, did you assign her a teaching assistant?"

"Well...... "Tut-tut......," the director said, "I won't tell you, I've been to work for so many years, and the number of times I've been to that old building is really limited, so I'll ask you!"

"However, according to my impression, our school rarely hires teaching assistants, and usually asks students for help...... But ......" Finally, the director thought of something and said, "I vaguely remember that Mr. Chen seems to have a son!"

"His son was not young at the time, and sometimes he would go there to help Mr. Chen, but ...... I'm not sure, I'll have to ask......"

Yes?

In a word, let the detectives see hope again!

"Son!?" Zhou Tang repeated.

"Yes," replied the director, "if I'm not mistaken, Mr. Chen was either widowed or divorced at an early age, and he raised his son alone!"

"Oh...... I also met her son once, and that was at Teacher Chen's funeral!" said the director excitedly, "At that time, some people were talking about how difficult it was for Teacher Chen to bring up his son alone......

"And...... Her son is also surnamed Chen, so people suspect that she should have divorced and then changed her son's surname!

"If you're widowed, you don't usually change your surname, right?"

His son...... What kind of school?" Zhou Tang asked eagerly, "Where do you work?"

"Where do I know where to go?" replied the director, "Mr. Chen is a bit withdrawn, oh...... It can't be said that she can endure loneliness, except for her, there is no way for ordinary people to stay in that gloomy old building for so many years!"

"Oh?" Zhou Tang asked, "Then tell me about this Teacher Chen's situation!"

"Hmm...... Teacher Chen is very serious, very serious in teaching, and has a good temper, no matter how naughty the students are, she is never in a hurry," the director replied, "However, she is not very gregarious, she does not like to talk much, and she does not have many friends......

"And ...... She seemed to like the course she taught, and the school originally looked at her alone, and she was old, and proposed to let her retire early, but she refused......"

She ...... Where does her family live?" Zhou Tang asked again.

"Oh, as I just said, her family lives in a bungalow at the back of the school!" said the director, "That bungalow was the teacher's dormitory of our aviation college at the earliest, but then the teachers became rich and sold their houses!"

"As a result, when the school wants to be demolished again, it can't be demolished, because those people want to be nails and make a lot of money, and now they can't move it......"

"Oh?" Zhou Tang stood up and asked, "Teacher Chen's family, do you still live there?"

"I don't know about that!" the director replied, "After Mr. Chen's death, it has nothing to do with our school, and I'm afraid no one in the school will know about it, right?"

"Okay, good!" Zhou Tang said, "You tell us Teacher Chen's name, let's go check ...... now"