Han Xin didn't know that Li Duwang and Nie Guangjun had a big fall because of him, and only knew that methamphetamine was detected from the sewage in his hometown. He, a policeman who walked out of the Linghai Branch, could not wait for feedback.

So I got up very early today, put on a mask and glasses, and drove to the gate of this company on the west side of the Science and Technology Innovation Park.

I thought it would be easier to find hidden drug users here than residential communities.

Because whether it is the management staff or the workers working in the factory, they all live outside from the perspective of their knowledge. As long as there is no special situation, they will work at the same time in the morning and get off work at the same time in the afternoon.

As a result, when I rushed over and saw that it was unrealistic to try to stay at the gate to identify one by one.

The current financial conditions are better, especially the local young people, who almost all have cars, and most of them drive to work.

Some young employees drive luxury cars such as BMW and Mercedes-Benz. Only older employees drive electric cars to and from get off work.

I sat in the car and stared for a while, but I didn't get anything.

Just as I was about to drive to the city, a police car drove slowly over.

The one who drove was Li Yijun, and Li Duwang, deputy director of Chengdong Police Station, was actually sitting in the passenger seat!

Han Xin turned on the turn signal and wanted to avoid them, but he was one step late, and the car he drove was recognized by Li Yijun.

"Brother, why are you here too? Are you not going to work today?"

Li Yijun drove the car to the gray modern side of the detachment, rolled down the window and looked happy.

Han Xin had no choice but to pull down his mask: "Passing by, I'll leave immediately. Li Jiao, long time no see, why are you in the same car with Li Yijun?"

Li Duwang really didn't want to see him, or even talk to him, but it was not good to not say hello when he met, so he could only squeeze out a smile: "I haven't seen you for half a year."

"It should be half a year."

"Captain South Korea, what are you doing?"

"Didn't you just say that, what about you when you pass by?"

"I... I'll accompany Xiao Li to learn about the situation. Team Korean, let's go in first, and we won't delay your work."

What's wrong with Li Duwang? When I saw me and saw ghosts, Li Yijun's expression was also very strange...

Han Xin was confused. Seeing that they had really driven the police car into the factory, he simply stopped thinking about it. He looked at the reversing mirror and drove the car to the main road.

It takes an hour to drive from here to the city, and this time needs to be used.

He picked up his phone, turned on Bluetooth, confirmed that he was connected, leaned over and clicked on the large central control screen, and made a call.

Hou Wen worked overtime until one o'clock in the morning last night. He just got up now and when he saw the caller ID, he quickly turned on the call button.

"Squad South Korea, it's early."

"It's getting late, tell me, is there any progress?"

"It's not much progress. From the time you left, Guan Tairong has gone to the toilet twice. He just went to the breakfast shop next door to have a bowl of noodles, and then packed a piece of wontons and took them back to his wife. He didn't go to any other place except that."

Hou Wen walked to the desk in the temporary dormitory, looked at the notebook, and continued: "His wife Zhang Xiaoping went to the supermarket yesterday afternoon to buy orders of vegetables and fruits, and now she has gone to the community to go to the toilet once, and she has not gone to other places.

Zhang Xiaoping is also taking drugs, and Feng Da has arranged for someone to apply to check the couple's mobile phone call records, express logistics records and personal bank accounts."

"Have you taken photos of Zhang Xiaoping?"

"I took a few photos at the supermarket yesterday afternoon and retrieved a surveillance video of her checking out. I was about to send it to you later."

"So your old unit agrees with our judgment?"

"It's a bit funny to say it. The community police knew Guan Tairong. At first, they thought Guan Tairong didn't look like a drug addict, but later they looked more and more like him. Half an hour ago, they just confirmed that at least one of the couple was taking drugs."

Community police rarely contact drug users, and it is normal that they cannot tell at first.

Han Xin smiled and asked, "How did you confirm it?"

Hou Wen explained: "Although their store is not far from the public toilet in the community, it is inconvenient to go out to relieve the work at night, so the couple, like the other merchants living in the store, used the red high-legged plastic spittoon to relieve the work at night.

Feng Da considered this yesterday afternoon and arranged for people to stay in the public toilet early this morning. He used the excuse that the toilet was blocked and asked Zhang Xiaoping to pour the feces into a specially prepared plastic bucket and then used a reagent plate for testing. The results showed that methamphetamine was positive."

Here, the source of poison was determined by digging cesspool and the black technology of "sewage poison testing".

Unexpectedly, the anti-drug team leader of Xingdong Branch actually used the same method to confirm whether Guan Tairong and his wife were drug users!

Han Xin thought this method was good, so she confirmed that Hou Wen was operating and it might take some time to get results, so she called Zhang Yuhang.

The bureau leader issued a death order and drug users must be found within a week.

Zhang Yuhang was helpless and asked with a wry smile as soon as he received the call: "Xiao Han, is your information reliable?"

"Zhang Da, the information is definitely fine."

"I just discussed with the Fencent Summit. If I really had no choice, I went to the Development Zone Management Committee. Just like on the International Drug Control Day, I will conduct a hair drug test for all employees!"

The situation in Linghai is different from Xingdong. There are no residential communities there, but science and technology parks and three enterprises.

Compared to dealing with residents, it is easier to deal with the operation team of the Science and Technology Innovation Park and the managers of the three companies.

What's more, Zhang Yuhang has such a good connection in Linghai. He said that he could really do it and even packaged the investigation into a drug control activity of the District Drug Control Office, but it is easy to alarm the enemy in this way.

Han Xin learned and sold it now, and couldn't help but smile and said, "Zhang Da, I don't think it's necessary to be so troublesome."

"What's the best way for you?"

"Everyone has to pee. I remember that many public toilets are filled with plastic buckets. I don't know if the pipes are blocked or if I want to extract urea."

Zhang Yuhang understood as if enlightened: "Colle urine and test it!"

Han Xin reminded: "But the urine of people who go to public toilets can only be collected, and the urine of gay men can only be collected. It is difficult to collect urine of lesbians. It is also difficult to collect urine from executives who have independent bathrooms in offices."

"At least half of the people can be detected, even if they can't be detected, they can be detected!"

"If you think it's possible, you can try it."

"It is completely feasible. Prepare a few plastic buckets, find a few people to guard the public toilets, stare at who has been disarmed and peed into the plastic bucket. When the urine in the plastic bucket is full, transport it out for testing. If the methamphetamine can be detected to be positive, the scope can be further narrowed."

Zhang Yuhang became more and more excited as he thought about it, and then smiled and said, "If you can't detect it, you will actually narrow the scope!"

"I hope it's a man. If it's a woman taking drugs, even if it's a narrower range, it's a troublesome to further confirm who it is."

"It's better than having a clue. Xiao Han, let's talk again, I'll make arrangements quickly."

"Okay, please contact us in time if you have any news."

This can be considered as the primary version of "sewage poison testing". It does not require the use of Wang Gong's "black technology" and can be done with the existing testing conditions of each branch.

Han Xin thought about it and suddenly found that the "sewage poison testing" work needs further improvement, so he called the detachment leader.

Xiao Yunbo originally thought he wanted to report a case, but he didn't expect that he would raise a question.

"Sewage is 'dead', but people live. In particular, some sewage in septic tanks may take a week or even longer to clean it, and it will not be cleaned.

In other words, the methamphetamine we finally detected within the scope of the traceability through layers of traceability may have been left by drug users a week or even a few weeks ago.”

Han Xin paused and then said: "In other words, within the scope of the circle, whether one or several hidden drug users exist now cannot be determined by the result of a sampling test. It requires long-term monitoring to confirm."

"Xiao Han, are you saying that our intelligence was reported too early?"

"Xiao Zhi, we informed the public security bureaus of various districts and counties and asked them to implement feedback. They must pay attention to it. But if they are just a drug addict, go to their jurisdiction to solve the problem and then go to other places, then they can't find this person even if they dig three feet into the ground!"

The superior opened his mouth and ran off his legs.

Xiao Yunbo didn't want to make grassroots police complain because of this, and murmured: "It makes sense. It seems that sewage and drug monitoring can only be used as a way to collect and grasp the drug situation, and cannot be used as a clue to the existence of drug cases."

Han Xin didn't expect the leader to adopt his suggestions, and couldn't help but smile and said, "That's what I think. It was pure luck to meet that drug addict in Xingdong yesterday."

Xiao Yunbo was talking to Cheng Wenming who had just come to the door and said perfunctorily: "Xiao Han, what you can think of is that you have changed your role and entered the working state of the detachment!

After the pilot projects of Xingdong and Linghai are over, you and Hou Wen will make a good summary and strive to come up with a set of application plans for sewage poison testing earlier."

"yes!"

Although Han Xin said "yes", he was thinking of summing up in his heart. I was not good at planning and so on. Then let Hou Wen think about it carefully.

Hou Wen is educated, able to write articles and reports, and it is most suitable for him to leave such things.

Xiao Yunbo didn't know what Han Xin was thinking, so he put down his phone and asked with a wry smile: "Cheng Zhi, how could you hide it from me for such a big thing!"

"This is not hiding it from you, it is a division of work."

Cheng Wenming was soaking and said it lightly.

Xiao Yunbo knew very well that although he left the Criminal Police Detachment, he was still a Criminal Police Detachment. He definitely believed that the Anti-Drug Detachment should be responsible for anti-drug control, and protecting anti-drug police officers was the Criminal Police Detachment's business.

It feels really bad to be kept in the dark...

Xiao Yunbo took a deep breath and whispered: "Xiao Han is the party involved, and he needs to avoid suspicion. I can understand how to keep it confidential to him, but there is no need to keep it confidential to me."

"I'm afraid it will affect your work, so I'm telling you this."

"How do I need to cooperate?"

Cheng Wenming came because of this incident and put out the cigarettes and said lightly: "What happened in Linghai last night has reminded me of it. To ensure that everything is foolproof, I just greeted the Political Department and removed him from the list of new police training.

Your detachment should also take corresponding precautions in the next two years, and try not to let him show up in public as much as possible. He should not let him participate in all major events in the district and county public security bureaus.

You can participate in case investigation, but there is only a little ink in his stomach. It is definitely unrealistic to let him participate in the whole process. I suggest that even the task force and work team should not allow him to join. If you have a specialized profession, it is best to let him do some work that he is good at."

This is not possible, nor is that, it means turning Han Xin into an invisible person!

Xiao Yunbo asked with a bitter face: "Cheng Zhi, you just said that the old guy is likely to have cancer. Even if Nan Yun failed to arrest the old guy for the time being, the old guy would not live long. As for letting him be invisible for two years?"
To be continued...