"Brother Kai, a guest called to make an appointment to find you in the morning, and I didn't tell you if you didn't come in the morning, and the guest should be here in three or four hours. Zheng Yufei looked at Zhang Kai, who had just walked into the office, and said, Zhang Kai nodded and said that he knew.

Three hours later, at half past one in the afternoon, the customer came, a woman who looked in her thirties, with a very good temperament, although she looked in her thirties, but in fact she was in her forties, the customer's surname was Wu, Zhang Kai called her Ms. Wu, Ms. Wu was a jewelry exhibition, not long after coming here, there was an exhibition here, all the equipment was the top, even the models were invited abroad, there was a blue diamond, the thumb was so big, the side was bordered with white gold, the whole shape was a drop shape, the day after tomorrow the exhibition was going to begin, Ms. Wu had a big boss above, and the big boss asked Ms. Wu to find someone to identify the blue diamond, I found an appraisal expert, but the appraisal expert was not available, and I found something else, there are not many people who do this business, and the fastest time to come here will be four days later, but the time is too late, and it will be carried out the day after tomorrow, the boss said that Ms. Wu came to Zhang Kai, saying that someone recommended it, so this is coming.

After Zhang Kai heard it, he followed Ms. Wu to the exhibition venue, which was really beautiful, Zheng Yufei and Zhao Tiande also followed, Zhao Tiande sighed in his heart: "These foreign models are so good-looking, they are all like the people in the painting, they are all tall and have good figures, which is great." Zheng Yufei, like any normal woman, has little interest in models, and is very interested in these jewelry.

Walking to the innermost booth, there was the blue diamond that Ms. Wu said, Zhang Kai put on rubber gloves and stretched out his hand to look at Ms. Wu and said, "What about the equipment?" Ms. Wu was stunned for a moment and said, "What equipment? Identification equipment? Don't you have it? I only have a simple magnifying glass here." Zhang Kai snorted and said, "Bring it to me to see if it can be used." ”

Ms. Wu went to get it, and Zhao Tiande walked up to Zhang Kai and said, "Brother Kai, don't you have that kind of magnifying glass for jewelry identification?" Pull-out, there is also a lamp and money detection function on it, 60 times it, right?" Zhang Kai nodded and said, "I want to see what kind of tools people in these places use." ”

Ms. Wu came over and brought a 20 times and a 30 times, all of which were relatively ordinary jewelry identification magnifying glasses, which were not as advanced as Zhang Kai's, Zhang Kaixin said that it was just so, picked up the 30 times identification glass, and said to Ms. Wu: "Open the cabinet, take it out and I'll take a look." ”

Ms. Wu entered the password, verified her fingerprints, and unlocked it with her voice, and then took out the blue diamond, Zhang Kai took it and held it in his hand, and kept looking at it with the identification glass, turning it over and over and observing it very carefully, and making a sound from her mouth.

Ms. Wu was nervous to death next to her, and said in her heart, what are you talking about, what are you talking about, Zhang Kai put it down after reading it and said, "It's really good." Ms. Wu's face changed suddenly, and she panicked and said, "What do you mean? It's really good?" Zhang Kai looked at Ms. Wu and said, "It's fake." Ms. Wu was stunned, smiled helplessly, and said with a little anger: "Impossible! Do you know the thing of diamonds? Especially this kind of colored diamond, it is impossible to imitate such a large fake diamond artificially, and even if it can, it can only be transparent, and it is absolutely impossible to imitate." ”

Zhang Kai sighed and said: "That's right, what you said is right, the crystal structure of colored diamonds is very complex, and the structure is extremely difficult, so it is impossible to be imitated, but one thing you should know is that if you want to imitate, you can form a very fine colored precipitate inside the crystal structure through light penetration technology, so that it becomes a colored diamond, if you don't know this in advance, most people will be fooled, don't believe you and take a look." ”

Ms. Wu picked it up and looked at it, followed Zhang Kai's words, followed this line of thought, and after reading it, she raised her head and looked at Zhang Kai and said: "Impossible, when was this packaged, except for me and the boss, no one else can open this display cabinet, unless the system has been hacked." Zhang Kai looked up at the surrounding surveillance video and said: "Bypassing the surveillance perspective, coming in from a dead end, tampering with the system, dropping the packet, or it was fake from the beginning, there are internal ghosts, you should call the police immediately." Ms. Wu picked up her mobile phone and made a call, and instead of calling the police, she told her boss first.

In the end, the boss decided not to call the police, and asked Ms. Wu to see if Zhang Kai could find more clues, Ms. Wu told Zhang Kai her thoughts, Zhang Kai agreed, and called Yan Xiaojing to help, Yan Xiaojing shook her head at Zhang Kai after operating the computer and said: "There is no trace of invasion, but someone has visited, opened this display cabinet, and deleted the access record with the highest authority after using it up." ”

Zhang Kai turned his head to look at Ms. Wu and said, "It seems that there are still internal ghosts, or your boss wants to play a game." Ms. Wu didn't quite understand, frowned and said, "What do you mean?" Zhang Kai shook his head and said, "It's nothing, maybe I'm thinking too much, do you have a polarizing magnifying glass? Ms. Wu nodded and said, "Yes, of course there is, in the inner room, do you want to use it?"

Zhang Kai picked up the blue diamond and said, "I will use the polarizer to find out who made it." Ms. Wu and Zhang Kai entered the house, Yan Xiaojing, Zhao Tiande, and Zheng Yufei did not follow up, feeling inappropriate.

But when he walked to the door, Zhang Kai thought for a while and said, "Xiaojing, you come in, Tiande, Zheng Fei, you two come in too, I have something to ask you both." The three followed.

Zhang Kai said to the three of them: "Look at the display screen, if you have any ideas, tell me when I come out after I finish reading." The three of them nodded, Zhang Kai turned on the machine, put the blue diamond away, and began to check, and found two letters under the polarizer, LY, Zhang Kai sneered, what does this LY represent? Zhang Kai suddenly sneered.

Zhang Kai turned off the machine, returned the blue diamond to Ms. Wu, and walked out and said, "I know who did it, I'll go to her tonight." Ms. Wu was a little wooden next to her, and she didn't react to what was going on, so she held back for a long time and only asked: "How did you know that there would be such a clue?" The person who makes such a good work will inevitably have vanity, so she wants to sign it to prove that it is her own work, but it can't be too obvious, so she uses this way, and only after observing with a polarizing magnifying glass can she find these two letters, okay, I'll go first, I already know who did it, tell your boss to prepare the money, and hope that the money he gives is worth it for me to do so much for him. ”

After finishing speaking, Zhang Kai left, Zhao Tiande drove and took a few people back to the office, Zhang Kai said in the car: "Xiaojing, find out the relevant information of this boss, Zheng Fei, you help her sort it out, I need to know something, it is best to have something about this blue diamond." Zheng Yufei and Yan Xiaojing snorted, Yan Xiaojing said, "Brother Kai, who is LY?" Zheng Yufei said: " Last time, the woman, the one named Liu Xunya, and another named Li Aiyin, think about it, Liu Xunya is equal to LXY, Li Aiyin is equal to LAY, although the name is completely different, but only the middle one in the letter is different, so I think it's her, what kind of art crimes, forgeries, thefts and the like before Lenovo, I think it's her nine times out of ten, how can such a person be a policeman, and now this is a return to the old business?"

Zhang Kai didn't answer, it was already more than five o'clock when he returned to the office, everyone proposed to go to dinner, Zhang Kai said that he would leave alone if he had something, and he didn't go to dinner with everyone.

At 6.20 in the evening, Liu Xunya returned to the house she rented, opened the door, turned on the light in the living room, sat on the sofa and drank a glass of Zengli gin, crossed Erlang's legs, as if she was the owner of this house, Liu Xunya looked at the person in front of her, and said with a happy and panicked expression: "Nick, why are you here?"