Police Detective

　　 It was night before returning to Shangjing, and Bai Song received Wang Liang's WeChat message as soon as he landed.

　　 Knowing that Wang Liang had already started arresting people, Bai Song decided to visit Tian Gen first. He was a little confused now and was not suitable to engage in a case, and Wang Liang did not need him.

　　 made a phone call with Xinqiao to report safety. Bai Song and Sun Jie took the airport light rail to Dongzhimen together, then the two separated, and he went to find Tian Gen by himself.

　　 Perhaps in the opinion of Sun Jie and others, Bai Song is in good condition, but Bai Song himself understands that he is a little out of rhythm. When Bai Song interrogated the smugglers and found nothing, he admitted that X was a smart man, and at the same time he was a little bit disappointed, so he needed to change his mood.

　　 Tiangen just entered the first year of junior high. Although he is sensible and has the ability to take care of himself, he still needs adults to keep an eye on him when he grows up. If it is really stocking, there may be problems.

　　According to Bai Song's usual habits, he must have gone to the work unit to see the case when he came back. Because of recent events, he decided to change his habits, not to look for his wife or to look at the case, but to go to Tian Gen first.

　　 Tiangen was at home alone. At the moment, he was playing on his mobile phone. He heard someone knock on the door and came over quickly. He heard that there was a white pine outside, and opened the door happily.

　　 Tian Gen was very happy to see Bai Song coming over. It wasn't that Bai Song brought things, but that he especially liked Bai Song, there was always something to ask or say.

"How are you doing? Did you study hard?" Bai Song glanced at the phone on the table. This phone was a domestic smartphone that Xinqiao bought for Tian Gen. Tian Gen is not young anymore. It's time to give him a cell phone. .

　　 "I want to play if I have a mobile phone. I have been checking Douyin every day recently." Tiangen was honest: "But, I'll just watch it for a while."

　　 "Well, just pay attention." Bai Song put down his things, picked up Tian Gen's phone, and was using the vibrato.

　　 The vibrato at this moment is different from a few years later. As soon as I opened it, many of them were landscape pictures. Tian Gen was watching, that is, Bai Song brushed two or three videos casually, and they were basically landscapes. The scenery from all over the world is already beautiful, and with the addition of filters, it is directly like a fairyland on earth. Baisong saw a desert landscape, which was more spectacular than the one he had personally visited.

　　 "Study hard and go to university in the future. You can go to work during summer vacation every summer vacation and travel on your own when you earn money. I did this before in university," Bai Song said.

　　 "Okay!" Tianne nodded.

　　 Bai Song hasn’t played Douyin before, and didn’t understand. After thinking about it, he searched for Zhang Wei with it, but it really found it.

　　 Zhang Wei has more than 2 million fans. The video content is basically about second-hand cars, and there are some other fun videos. The click-through rate is very high.

Tian Gen is not that tall, so he watched Bai Song constantly reviewing videos there, and he didn't know what he was doing, so he giggled. Tian Gen saw that there were fruits in the bag Bai Song brought, so he washed two apples. Bring it and hand it to Bai Song.

　　 "This brother is my friend", Bai Song explained, he was fine, found a chair and sat down, and then gnawed at the apple and watched Zhang Wei's video.

　　 What Bai Song didn’t know was that when he used the video like this, the system would assume that this user likes watching second-hand car videos, and wait for Tian Gen to use Douyin again. It is estimated that it is a variety of car dealers...

　　 After reading a few, Bai Song didn't find it interesting. The software was very simple. He found that from Zhang Wei, he could also see who Zhang Wei followed and which videos Zhang Wei liked. (Note, this information cannot be hidden in 2017)

　　 From the video liked by Zhang Wei, Bai Song actually saw Zheng Yanwu.

　　 Zheng Yanwu has also made a lot of videos, all of which are beautiful in the world, and he has two or three hundred thousand fans, and his shooting level has improved greatly.

Bai Song doesn’t understand this, but he has also received pictures from Lao Zheng before and seen Lao Zheng’s circle of friends. He feels that Lao Zheng has improved now, and he can shoot the beautiful scenery of 80 points to 120 points. The feeling of transcending perfection has a touch of artistic conception.

　　 Thinking of this, Bai Song decided to download one of his own, and occasionally watching valuable videos can be regarded as entertainment.

　　 Putting down the phone, Bai Song saw the math problem on Tian's desk.

　　 "Are you a math problem for the first year of junior high school?" Bai Song found that he couldn't see the answer at a glance.

　　A^2x^2-(3a^2-8a)x+2a^2-13a+15=0, a is a positive integer and the equation has integer roots, find a.

　　 "This is our competition question, this... very simple." Tian Gen looked at Bai Song, feeling a little proud.

　　 "I can see that when a=1, this equation can be established, so a=1, right?" Bai Song has a very strong arithmetic ability and calculated a value of a at once.

　　 "Yes," Tianne nodded, and looked at Bai Song with some admiration: "You are so fast...but there are three solutions for a, 1, 3, and 5 are possible. There are four ways to solve the problem."

　　 "Then tell me something." Bai Song was very willing to listen to this kind of problem-solving ideas.

Tian Gen was very happy to hear this. He started to talk about it. The easiest way to solve this problem is to factorize, and finally get [ax-(2a-3)][ax-(a-5)]= 0. In addition to this method, there are three other methods, and Tianne explained them one by one.

　　 "Did you think of these four methods?" Bai Song asked.

　　 "I just thought of factorization," Tane said: "The rest is what our teacher said."

　　 "Then your teacher is also quite good, follow him to study hard." Bai Song said, did not continue Kuatane. This problem can think of such factorization, which requires good logical thinking and mathematical skills.

　　 "Yes!" Tian Gen looked a little excited, he hadn't chatted with Bai Song like this for a long time.

　　 He likes Bai Song the most and admires Bai Song the most, mainly because Bai Song is too knowledgeable and can learn a lot every time.

Then, Bai Song and Tian Gen chatted for more than an hour, from a few math problems to astronomy and geography, and talked about everything in the universe. In short, Tian Gen was very interested in these things. Bai Song planned to give Tian the astronomical telescope after this trip. Root sent it over, and he himself has nothing to watch lately.

I have to say that astronomical telescopes do have a limitation. Unless they are shooting nebulae, they can be seen directly through ordinary astronomical telescopes. They are nothing but the sun (requires Bard film), the moon and the five planets of gold, wood, water, fire, earth, and others. You can't see clearly. And these seven celestial bodies that can be seen have not changed all day long.

　　 Come out from Tianne, Bai Song feels that his condition is much better.

Mathematics is very reasonable and logical. A simple junior high school math problem gives Bai Song a lot of novel feelings. It can be exhaustive or violent calculations can be analyzed and tried, and the optimal solution can also be seen at a glance. . If Tianne didn't tell Bai Song how to do it, Bai Song would be able to solve it, but Bai Song would be choked up if he was anxious.

　　 The same is true for him. Although it is said that an X who knows him well has been targeting him, it is nothing to have a qualified opponent. Coming out from here, Bai Song confirmed that no one was following, and directly took a taxi to the city bureau.

　　 At this moment, Wang Liang and the others are here. Bai Song called in advance and wanted to bring them something to eat.

　　 "How many people are there on your side?" Bai Song asked.

　　 "Now there are more than a dozen in the command center. Tonight's rest is enough." Wang Liang said: "Now some places have already started. We plan to go to Yuzhou tomorrow on a business trip. There will be the most."

　　 "X is not among these people, right?" Bai Song was a little puzzled.

　　 "It has nothing to do with X", Wang Liang said: "Why do you care about him so much?"

　　 "I'll go over and tell you in a while," Bai Song looked around: "Do you have any food there? I'll bring you some more past?"

　　 "There is something to eat here, you bring...you bring a roast duck over to see me, add some dishes." Wang Liang smiled.

　　"Roast duck", Bai Song looked at his watch: "I'm not sure if I can buy it."

　　 "Just kidding, there is something to eat here, come if you want to come." Wang Liang smiled.

After hanging up the phone, the driver's master was very enthusiastic. He heard Bai Song say roast duck, "I tell you young man, come here to eat roast duck. You don't have to go to some so-called gatherings. Many shops are good, 100 yuan. One piece of money is delicious."

　　 "Master can still buy it at this time?" Bai Song asked.

　　 "Yes, no problem, but a detour." The driver is familiar with the neighborhood.

　　 "That's it, take me there." Bai Song nodded, "Don't go too far."

　　 The city bureau is actually not far away. It is less than one kilometer away from the work unit of Bai Song and others, and it is about ten kilometers away from Tane.

　　Wang Liang and all of them can walk, and a short walk south from the Criminal Investigation Bureau is the Supreme Court, and the city bureau is opposite the Supreme Court.

　　Tane is not familiar with Baisong near here, but I feel that the driver hasn't made any detours. I found a big restaurant in less than two kilometers, which is still open at the moment.

　　 Bai Song asked. After waiting for half an hour, he first checked out the driver and asked the driver to go first. He ordered three roast ducks to take away.

　　 There are a lot of people over there, everyone has a taste.

　　Sitting here is really boring, Bai Song downloaded Douyin, followed Lao Zheng and Zhang Wei, and brushed it casually. I used it at Tianne's place before, but now I have time to watch it slowly.

　　 Zhang Wei is really good at talking. He has already made more than 100 small videos, some of which are quite funny, while Lao Zheng is much more professional, all of which are beautiful photos.

　　 Bai Song thought before, if one day Zheng Can and Zheng Yanwu and his son recognize each other, then Zheng Can can give Zheng Yanwu the driver. Of course, this is just thinking about it. At the beginning, Bai Song agreed to Feng Yiling not to let Zheng Yanwu go to ask about Zheng Can, and Zheng Yanwu himself did not have this idea.

　　 Thinking of this, he had to remember Feng Yiling. Feng Yiling knew him very well. If it hadn't been for Feng Yiling to recruit the younger brother and others, Bai Song even suspected that X was also related to Feng Yiling.

　　Bong Yiling and Bai Song actually don't have much antagonism. If Bai Song didn't get in touch with Zheng Can and made her panic, she would not necessarily target Bai Song. After all, targeting a policeman is really serious.

　　 And Bai Song is now so targeted, he can only consider what X has to do with the fake flight attendant, or that the case he is investigating does touch X's life safety.

　　 Or, X itself is a psychopath.

Judging from the two cases of X design, this is a somewhat clever, but somewhat self-serving person. He wants to design a perfect closed loop every time. He feels that these ordinary people are fools. As long as he has no ideas, these people He would be played around, and every time he fell short of success, he couldn't reach perfection. The design for Bai Song this time is probably the "masterpiece" he wants to complete.

　　 From this perspective, X is still very harmful. It's just that Bai Song still doesn't particularly understand why this X is so strong, how can he understand this degree of him. He carefully reviewed the incident when he was reported to the police that he saw someone in the river. Although it was said that he was fished out, it was confirmed through that incident that he was involved in the corpse case in Beijing, but this is how you can understand it. he?

　　 This reminded Bai Song of another thing. When he was handling the case in Nanjiang Province, the last little girl had a book they had compiled. Later, Yan Yu checked it at school and found that someone had sold the book.

　　 Could it be that X also got this book, and studied it carefully?

Thinking of this, he suddenly discovered that for so many years, whether it is social media or online news, whether it is a formal textbook or a novel he wrote with Xu Fang, there are too many things that can expose his own character. If X is enough Being smart is indeed able to analyze a lot of things.

　　 At present, he has been in contact with X three times. Not only is X analyzing him, he also has his own analysis of X. According to Bai Song's current thinking, if there is someone who has been in contact with X and also knows something, such as Wang Shichun, then X will have a much plump image.

"Sir, your roast duck." Bai Song was thinking about it. The waiter came over with two large plastic bags, which included six boxes of duck meat and three boxes of pretzel duck racks, in addition to a pile of sauce and cakes. , Congsi, etc.~www.wuxiaspot.com~ Bai Song stopped thinking about these messy problems, because he had already settled the bill in advance, so he went out and took a taxi and went to the city bureau.

　　 In the car, he didn't chat with the driver, and then he introspected for a while, and found that he has many shortcomings, that is, he has been too pursuing perfection. The old man once said something to him, and he gradually understood it.

　　 When many big leaders handle affairs, they always give people a very calm, unhurried appearance, and they do not delay handling cases at all. This is a precipitation of experience, and Bai Song feels that he is still far behind.

　　 Thinking of this, when Bai Song went to the Municipal Bureau, he walked a little slower when he got out of the car.

　　 This seems to be the first time in so many years that he is deliberately slowing down his walking speed.

　　 The Municipal Bureau is still very lively at the moment. When everyone saw the white pine coming, they also brought the roast duck, and they all gathered around.

　　 "Okay, interesting." Wang Liang stared at the screen without turning his head back, but he could smell it.

　　 "Why are you so serious?" Bai Song asked.

　　 "I am responsible for the monitoring," Wang Liang said: "Hurry up, give me a roast duck and feed me one."

　　 "Okay, no problem~" Bai Song laughed.

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