It has to be said that the design of this copper bean is very ingenious.

When Wu Ming and Lin Jia went to the coating factory laboratory under the leadership of Director Lu, borrowed tools and carefully opened them, they found that the copper bean was composed of two halves of a hollow hemisphere designed as a child-mother buckle. Moreover, the joint of the hollow hemisphere of the two halves of the buckle is also coated with a layer of high-efficiency glue. After laboratory personnel identified the glue as the glue used for the sealing of the invisible paint barrel.

What surprised them even more was that what was preserved in the copper bean was a small cloud of invisible paint. After the precise weighing of the balance, it was exactly the weight of the paint that had been lost before – five grams.

At this point, the hearts that the two of them had been hanging on finally fell.

Since the most critical thing is that the missing five grams of paint have been found, the next step is to find someone with it.

Wu Ming's previous questioning of the director of logistics and the two cleaners Wang and Liu has basically confirmed that the cleaner surnamed Liu, who is specifically responsible for the septic tank outside the production workshop and intends to take leave before the holiday, is the most suspicious. Coupled with the evidence of the strange behavior of Sui Lizheng, the person in charge of the nursery garden of the Municipal Garden Bureau, who led his family to travel abroad, it can be said that Wu Ming's judgment is basically the same.

What is certain is that the cleaner surnamed Liu did not have access to invisible paint. Well, someone must have stolen it beforehand, either by giving it to him directly, or by throwing it directly into the septic tank through the sewer of the toilet. Then through him, he contacted Sui Lizheng of the Lion Rock Nursery Park, and used the cleaning of the septic tank and the help of sanitation vehicles transporting manure to transport the invisible paint hidden in the small copper beans out of the factory area.

In this way, the person who threw the stolen five grams of invisible paint into the septic tank was obvious - only one of the three supervisors on duty that night, Zheng Qingqing, who went to the toilet with a stomachache when the problem paint was about to be sealed, had a chance.

Without hesitation, the two took the cleaner surnamed Liu to the office of Director Lu for interrogation.

"Do you know this thing?"

"I haven't seen it. ”

"You're still going to quibble?"

"I really haven't seen it. ”

"Then have you seen Zheng Qingqing, before the whole factory is under martial law?"

“…… I've seen it. ”

"Where?"

"My dorm. ”

"Zheng Qingqing took the initiative to find you?"

"Yes. ”

"Do you have a good relationship?"

"General. ”

"He often goes to your dorm?"

"Nope. ”

"And what did he ask you for?"

When Lin Jia asked about this, Wu Ming next to him couldn't help but interject coldly: "Can you finish the words in one go?"

Raising his head, he first wiped the sweat on his forehead, and the cleaner surnamed Liu glanced at Wu Ming's evil smile, and then said: "In my memory, it was the first time Zheng Qingqing went to my dormitory. I was somewhat surprised by his visit. But what he said next brought me more than just surprise. ”

And then he said, don't stop. ”

"Yes. The cleaner surnamed Liu raised his hand again to wipe his sweat and said, "My daughter went abroad at the end of August to study at the University of Illinois at Urbana-Champaign. We chatted for a while, and before we knew it, we talked about our children, and naturally we talked about my daughter's study abroad. But Zheng Qingqing suddenly talked to me about the incident that happened in the same school a few years ago, named Zhang Yingying.

Although I was very reluctant to listen to it at the time, Zheng Qingqing kept talking. From how good Zhang Yingying's studies were, how she chose to study at Urbana Champaign, and how she disappeared.

Just as I was about to interrupt him, or even to get rid of him, he suddenly turned to my work. Finally, I was asked, 'Do you have extra money to fish every time you clean the septic tank?' I said, that's all about the leadership, what does it have to do with us.

He also said, 'How did I hear that at the end of each year, the relevant units of the Municipal Garden Bureau will send you a big red envelope?'

I always felt that he had something to say that night, so I asked him directly, 'Is there something you have to do today?', but Zheng Qingqing stood up and said, 'Nothing', so while walking out the door, he added, 'I heard that your daughter is also very good, don't be careless as a parent'." Then he was gone. ”

"That's all?"

"That's all. ”

Wu Ming and Lin Jia glanced at each other, and Wu Ming took it and asked, "Then how do you explain your next behavior of lying and asking for leave?"

Glancing at Wu Ming again, the cleaner surnamed Liu said, "I know that I can't hide it from you." It's true that I don't have any nephews back home to marry. However, I was disturbed by Zheng Qingqing's inexplicable visit that night, and the next day I contacted Zhang Mingli, the director of the greenhouse of the Municipal Garden Bureau, and wanted to arrange the cleaning of the septic tank before the holiday, but suddenly found that Zhang Mingli could not be contacted.

I barely slept soundly that night, and how I thought and felt that Zheng Qingqing's visit was related to cleaning the septic tank. In addition, I suddenly couldn't contact Zhang Mingli, the more I thought about it, the more scared I became. If it weren't for the fact that my daughter had just gone abroad and was studying at the same university as Zhang Yingying, who had an accident a few years ago, I wouldn't have thought too much. So, whether I thought about it or not, I finally decided to find an excuse to take a leave of absence in order to avoid this septic tank cleanup. ”

Hearing the confession of the cleaner surnamed Liu, Lin Jia immediately picked up the phone to contact Zhao Zengyuan and ordered: "Put down the work at hand for the time being, you immediately take someone to the greenhouse of the Municipal Garden Bureau, and find the person in charge, Zhang Mingli, no matter what." And asked him why he suddenly lost contact a few days before New Year's Day. As soon as you can figure out the truth, just call me by phone. ”

"Yes, Forest Bureau. ”

"Director Lu, now you can summon Zheng Qingqing over. ”

"Good. Director Lu touched the phone in the factory and said, "Send someone to bring Zheng Qingqing to my office immediately." ”

was interrupted by Wu Ming: "Send it to my office, I'll wait for him there." After that, he just nodded to Lin Jia, and then turned around and went back to his office alone.

Of course, Lin Jia understood Wu Ming's intentions, this guy must be impatient to stay in the martial law coating factory for too long, and wanted to figure out the case as soon as possible. And there are not many clues at present, only based on the copper beans found in the septic tank and the five grams of lost invisible paint hidden inside, and the confession of the cleaner surnamed Liu, I am afraid it is difficult for Zheng Qingqing to confess, so Wu Ming plans to use his own way again.

Even if he knew that this was a violation of discipline, Lin Jia had no right to interfere with Wu Ming's behavior. Besides, Lin Jia also wanted to end this matter as soon as possible, so she turned a blind eye. As for the puzzled gaze handed over by Director Lu, Lin Jia only didn't see it.

At this time, Song Jin and the others who cleaned the septic tank had also been completely completed, and returned to Director Lu's office with a strong smell one after another.

"Director Lu, can you take a bath in the bathhouse here now?"

"Yes. After picking up the phone in the factory again and making arrangements, he said to Lin Jia: "Forest Bureau, you can go, the replacement work clothes are also ready for you." ”

"Thank you. ”