The night was quiet, and after leaving the Didan Elementary School through the forest path with ginkgo biloba leaves, and separating from Conan and the doctor, Gao Cheng took Xiao Ai to walk on the side of the moonlit street.

The lights on the first floor of the detective agency are still on, and the barking of the big dog Manguno and the shouting of the twin sisters can be faintly heard.

Gao Cheng's thoughts went back to when he was alone in the office watching TV.

Now a lot of things have changed, Xiao Ai, who was supposed to follow the doctor, lived on his side, the twin sisters who had accidents one after another with their employers also settled downstairs, almost half of the cases handled by Uncle Maori were robbed by him, and there was a slightly different detective in the world of Conan.

Gao Cheng looked at Xiao Ai, who was sleepy beside him.

The doctor who is dull and likes to lose everything has no Xiao Mourn to take care of, and finding his first love is his compensation, and seeing the doctor's face smiling crookedly when he comes back, the result should be good.

After being single for decades, the spring of the doctor has finally arrived.

"Why do you look relieved?" Xiao Ai raised her eyelids and looked at Gao Cheng, "What about the limited edition of Fusa-painting?" ”

"Uh, I forgot about ......" Gao Cheng grabbed his hair, "I can't ignore the doctor's lifelong happiness, it should be no problem to ask the doctor for a few bags next time, right?" ”

……

"This officer is truly courageous, and I cannot but commend you for your courage...... I'll tell you the location of another bigger firework, and you'll see my hint 3 seconds before the explosion, so I wish you success......"

A magnetic male voice echoed in Sato's ears.

"Miwako! Miwako! Yumi from the traffic class walked into the office and saw Sato lying on the table in a daze, "Wake up, Miwako." ”

"Huh?" Sato came back to his senses, "Yumi? ”

"What are you thinking? I was in a daze just now......"

"It's nothing, it's just a little tired."

"Really?" Yumi looked at Sato, whose face was not very good, and reminded in a daze, "By the way, Detective Joto has already come, and it is about the case of the post office robber last time." ”

"Oh good." Sato was a little absent-minded, cheering up and looking at Gao Cheng, who walked into the office.

"Officer Sato, you don't seem feeling well?" Gao Cheng handed a transcript document to Sato.

"It's, it's okay."

Sato smiled apologetically, took the document and put it in the folder.

"Chengto, I'm sorry for you this time, I've already submitted a bonus application above......"

"I just helped by the way."

"But thanks to you, Takagi, you were able to dodge the bomb explosion." Sato looked a little complicated with gratitude in his eyes, coupled with the fact that he had something on his mind.

Gao Cheng smiled, looked around and said, "By the way, why didn't you see Officer Takagi?" ”

"He seems to have something to do with Shiratori."

Sato's face darkened slightly, and when Gao Cheng left, he also packed up his things and got up and went out.

"Hey, Miwako," Yumi reminded with some concern, "don't forget to sing karaoke at night!" ”

"yes," Sato remembered, and turned back and asked, "What time do we meet?" ”

"At nine o'clock in the evening, didn't I send you a text message a year ago?" Yumi said helplessly, "You don't want to delete the text message immediately every time you read it!" ”

"I'm sorry," Sato said with an embarrassed smile, "If I don't delete it right away, the newsletter will fill my mailbox all at once, and I won't be able to see the important newsletter......"

"So you mean my text isn't important?"

"No, anyway, let's meet again at nine o'clock......

Gao Cheng listened to the conversation between the two police girlfriends behind him, and his ears couldn't help but move.

Takagi and Officer Sato seem weird lately, I don't know if it's a relationship problem......

Speaking of which, Sato seems to have liked a sacrificial policeman, what is it called?

I remember that it should be called Matsuda Jinpei, yes, he looks very similar to Officer Takagi, and he was also involved in an explosion and died, probably because Takagi was almost killed a few days ago and reminded Officer Sato.

It happened to be Tuyao Saturday, and when Gao Cheng returned to the detective agency at noon, Xiao Ai, who was resting at home, had already washed his clothes.

"Xiao Ai, you said that you would go to the cup to the cup mall with Ayumi later, right?"

Gao Cheng asked Xiao Ai downstairs while sorting out his power of attorney report and case materials.

"It's not very safe out there right now, so it's best to be careful."

"Don't worry," Xiao Ai contentedly hugged a few Fusa-painted designer bags, "There is a doctor with us, and Kudo is also there." ”

"That's why I'm worried about ......"

Gao Cheng spread out the case materials and re-entered the "Okinawa Sea Dragon Palace Incident," "Karuizawa Yamanaka Old House Incident," and "Karuizawa Black Magic Murder Incident" into the computer.

Matsuda Jinpei's case and Officer Takagi's almost death blow up reminded him of the incident.

Conan's world is a dangerous world in the end, not only there are crimes and murders, but also various explosions that affect innocents, no one can guarantee to survive the explosion, and Conan has survived several near-deaths.

"Dididi!" A mobile phone ringtone interrupted Gao Cheng's work, and the garden suddenly called.

"Hey ......"

"Joto, when are you coming?" Yuanzi asked, "You promised me and Xiaolan to help us prepare for tomorrow's mock exam, and I will go to Xiaolan's house soon......"

"I'll go right over."

Gao Cheng put down his phone with a stiff face.

I almost forgot, tomorrow Didan High School will conduct a national mock test, and as a senior, he was pulled by the garden.

The high school knowledge I learned in the past has long been returned to the teacher, not to mention that I have never gone to school in Japan in my life, and the original owner has not left much behind.

God knows how he would have agreed......

Gao Cheng looked at the information in his hand.

However, he has a certain understanding of biology (medicine) and physics, although they are all detective-related, but it should be enough to deal with high school knowledge, right?

After sending Xiao Ai to join up with Dr. Asa and Ayumi, Gao Cheng took his previous handbag and rushed to Maori's house with a head full of knowledge and high school exams.

If you think about it carefully, his English, especially Chinese, is not bad, and he should have no problem coping with the exams of Japanese high schools, and he also knows some about Japanese history, so he seems to be able to help Yuanzi and Xiaolan.

"Joto, why did you come here? Hurry up! Hurry up! In the office of the Maori Detective Agency, Yuan Zi and Xiaolan had already started to review, and there were a bunch of books on the coffee table sofa, and Yuan Zi, who looked distressed, couldn't wait to grab Gao Cheng.

"It took a little time to find the previous books," Gao Cheng sat on the sofa next to him and said strangely, "Isn't the uncle here?" ”

"Dad, he's gone to deliver a report to a client," Xiaolan raised her head and looked at Gao Cheng, "Senior Chenghu, Sister Math said that you are very good at math, so we want to trouble you." ”

"Mathematics," sweat dripped, "I seem to be ......"

Why math?

……