It was already evening when Bai Song returned to Shangjing. As soon as he landed, he received a WeChat message from Wang Liang.
Knowing that Wang Liang had already started arresting people, Bai Song decided to go see Tian Gen first. He was a little confused at the moment and was not suitable to handle the case, and Wang Liang really didn't need him.
After calling Xinqiao to report that he was safe, Bai Song and Sun Jie took the airport light rail to Dongzhimen together. Then the two separated and he went to look for Tian Gen alone.
Maybe Sun Jie and others thought Bai Song was in good shape, but Bai Song himself knew that his rhythm was a little disrupted. When Bai Song interrogated the smugglers and got nothing, he admitted that X was a smart man. At the same time, he felt a little lost, so he needed to change his mood.
Tian Gen has just entered the first grade of junior high school. Although he is very sensible and able to take care of himself, a child of this age still needs more attention from adults during his growth. If he is left alone, problems may arise.
According to Bai Song's usual habit, he would definitely go to the unit to check on the case as soon as he came back. However, because of recent events, he decided to change his habit. He would not go to see his wife or check on the case, but would go to see Tian Gen first.
Tian Gen was home alone, playing with his mobile phone. When he heard someone knocking on the door, he hurried over. When he heard it was Bai Song outside, he opened the door happily.
Tian Gen was very happy to see Bai Song coming. It was not because Bai Song brought anything, but because he particularly liked Bai Song and always had something he wanted to ask and say.
"How are you doing recently? Have you been studying well?" Bai Song glanced at the mobile phone on the table. This phone is a domestically produced smart phone that Xinqiao bought for Tian Gen. Tian Gen is not a child anymore, so it's time to give him a mobile phone.
"I want to play with my phone when I have it. I watch Tik Tok every day recently." Tian Gen was honest: "But I only watch it for a short while."
"Okay, just be careful," Bai Song put down his things, picked up Tian Gen's phone, and was watching Douyin.
Tik Tok now is different from what it would be a few years later. When you open it, you’ll see a lot of landscape pictures. That’s what Tian Gen was watching. Bai Song casually scrolled through two or three videos, which were basically all landscapes. These scenery around the world are beautiful in themselves, and with the addition of filters, it's like a paradise on earth. Bai Song saw a desert scenery that was even more spectacular than the ones he had been there in person.
"Study hard, and when you go to college, you can work part-time every summer vacation and earn money to travel by yourself. I did this in college," Bai Song said.
"Okay!" Tian Gen nodded.
Bai Song had never used Douyin and didn't understand it. After thinking about it, he searched for Zhang Wei, and he actually found him.
Zhang Wei already has more than 2 million fans. The content of his videos is basically about used cars, and there are some other interesting videos, which seem to have a very high click-through rate.
Tian Gen was not that tall, so he just watched Bai Song watching videos non-stop, not knowing what he was watching, and just grinned foolishly. Tian Gen saw that there were fruits in the bag that Bai Song brought, so he washed two apples, and handed one to Bai Song.
"This brother is my friend," Bai Song explained. He didn't have anything to do, so he found a chair to sit down, then ate an apple and watched Zhang Wei's video.
What Bai Song didn't know was that by watching videos like this, the system would assume that this user liked watching used car videos. When Tian Gen watched Douyin again in the future, he would probably see all kinds of car dealers...
After looking at a few, Bai Song felt that it was not interesting. This software was very simple. He found that he could also see from Zhang Wei who Zhang Wei followed and which videos Zhang Wei liked. (Note: it was not possible to hide this information in 2017)
In the video that Zhang Wei liked, Bai Song actually saw Zheng Yanwu.
Zheng Yanwu has also shot a lot of videos, all of which are beautiful scenery from all over the world. He also has 200,000 to 300,000 fans, and his photography skills have improved greatly.
Bai Song didn't understand all this, but he had received pictures from Lao Zheng before and had read Lao Zheng's circle of friends. He felt that Lao Zheng had improved again and could take a beautiful scene that originally scored 80 points to 120 points, surpassing the feeling of perfection and adding a touch of artistic conception.
Thinking of this, Bai Song decided to download one for himself. Watching valuable videos occasionally can be considered entertainment.
Putting down his phone, Bai Song saw the math problems on Tian Gen's desk.
"Is this a math problem for the first grade 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... is quite simple." Tian Gen glanced at Bai Song and felt a little proud.
"I can see that when a=1, this equation is valid, so a=1, right?" Bai Song has a strong ability in mental arithmetic and he calculated a value of a in one go.
"Yes," Tian Gen nodded, looking at Bai Song with some admiration: "You calculated very quickly... But this a has three solutions, 1, 3, and 5 are all OK, there are four ways to solve the problem."
"Then tell me about it." Bai Song was very willing to listen to this way of solving the problem.
Tian Gen was very happy to hear this, and he began to explain in detail that the simplest way to solve this problem is to factorize it, and finally get [ax-(2a-3)][ax-(a-5)]=0. In addition to this method, there are three other methods, and Tian Gen explained them one by one.
"Are these four methods all your thoughts?" Bai Song asked.
"I just thought of factorization," Tian Gen said, "the rest is what our teacher taught us."
"Your teacher is quite good. Learn from him well." Bai Song gave this instruction but did not continue to praise Tian Gen. Being able to think of such factorization for this problem requires good logical thinking and mathematical ability.
"Yeah!" Tian Gen seemed a little excited. He hadn't chatted with Bai Song like this for a long time.
He likes Baisong the most and admires Baisong the most, mainly because Baisong has such a wide range of knowledge and he can learn a lot from him every time.
Then, Bai Song chatted with Tian Gen for more than an hour, from some math problems to astronomy and geography, and to everything in the universe. In short, Tian Gen was very interested in all of these. Bai Song planned to give the astronomical telescope to Tian Gen after he returned this time, as he himself didn't have anything he wanted to see recently.
It has to be said that astronomical telescopes do have a limitation. Unless you are photographing nebulae, etc., the only things you can see directly through an ordinary astronomical telescope are the sun (which requires a Baade membrane), the moon, and the five planets Mercury, Venus, Venus, Mars, Jupiter, and Saturn. The others cannot be seen clearly. And these seven visible celestial bodies do not change much from day to night.
After coming out from Tian Gen, Bai Song felt much better.
Mathematics is very reasonable and logical. A simple junior high school math problem gave Bai Song a lot of new feelings. He could use exhaustive methods, brute force calculations, analysis and attempts, and he could also see the optimal solution at a glance. If Tian Gen didn't tell Bai Song the method, Bai Song could have solved it, but Bai Song would be in trouble if he was too anxious.
The same goes for him. Although there is someone named X who knows him very well and has been targeting him, it is nothing to have a qualified opponent. After coming out here, Bai Song made sure that no one was following him, so he took a taxi directly to the Municipal Bureau.
Wang Liang and the others were all there at the moment, so Bai Song called in advance and wanted to bring them some food.
"How many people are there on your side?" Bai Song asked.
"There are still more than a dozen people at the headquarters, so it's hard to rest tonight," Wang Liang said. "Some places have already started taking action. We plan to go on a business trip to Yuzhou tomorrow, where there are the most people."
"X is not among these people, right?" Bai Song was a little confused.
"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 later." Bai Song looked around and said, "Do you have any food over there? I'll bring some over for you."
"There is food here. You can bring... you can bring a roast duck and add it as a dish." Wang Liang said with a smile.
"Roast duck." Bai Song looked at his watch and said, "I'm not sure I can buy it."
"Just kidding. There is food here. If you want to come, come quickly." Wang Liang said with a smile.
After hanging up the phone, the driver was very enthusiastic. He heard Bai Song talking about roast duck and said, "I'm telling you, young man, you don't have to go to some Jude or something to eat roast duck here. There are many good restaurants. One hundred yuan a piece is delicious."
"Master, can I still buy it at this time?" Bai Song asked.
"Yes, no problem, but we have to take a detour." The driver was very familiar with the area.
"Okay, take me there." Bai Song nodded: "Just don't take too far."
The Municipal Bureau is actually not far away. It is less than one kilometer away from Bai Song and others’ workplace, and about ten kilometers away from Tian Gen.
Wang Liang and his friends can all walk there. The Supreme Court is a short distance south from the Criminal Investigation Bureau, and the Municipal Bureau is opposite the Supreme Court.
Baisong was not very familiar with the area around Tiangen, but it seemed that the driver did not take much of a detour. He found a big restaurant in less than two kilometers, which was still open.
Bai Song asked and found out that he would need to wait for half an hour, so he paid the bill first and asked the driver to go first. He then ordered three roast ducks to take away.
There are a lot of people over there, so everyone can try it.
It was really boring sitting here, so Bai Song downloaded Douyin, followed Lao Zheng and Zhang Wei, and started scrolling through it casually. I just watched it casually at Tian Gen's place before, but now I have time to read it slowly.
Zhang Wei is really good at talking nonsense. He has shot more than 100 short videos, some of which are quite funny. However, Lao Zheng is much more professional and all his photos are beautiful.
Bai Song had thought before that if Zheng Can and Zheng Yanwu, father and son, recognized each other one day, then Zheng Can could be Zheng Yanwu’s driver. Of course, this is just a thought. At the beginning, Bai Song promised Feng Yiling not to let Zheng Yanwu interfere in Zheng Can's affairs, and Zheng Yanwu himself did not have such an idea.
Thinking of this, he couldn't help but recall Feng Yiling. Feng Yiling knew him very well. If Feng Yiling hadn't finally confessed all his younger brothers, Bai Song would even suspect that X was also related to Feng Yiling.
Feng Yiling and Bai Song actually don't have much hatred against each other. If Bai Song hadn't come into contact with Zheng Can, which made her a little panicked, she wouldn't necessarily target Bai Song. After all, targeting a policeman is really serious.
Now that Bai Song is being targeted by X, he can only consider what kind of relationship X has with the fake stewardess, or that the case he is investigating now does indeed involve X's life safety.
Or maybe X himself is a psychopath.
Judging from the two cases designed by X, this is a person who is somewhat smart but also a bit self-willed. He always wants to design a perfect closed loop, thinking that these ordinary people are fools. As long as he has a plan for everything, these people will be fooled by him. However, he always fails to achieve perfection. This design for the white pine is probably the "masterpiece" he wants to complete.
From this perspective, the harm of X is still very great. But Bai Song still doesn’t quite understand why this X is so strong and how he can know this much about him. He carefully reviewed the incident when he called the police to report seeing human hands in the river. Although he was fished out and that incident confirmed that he was involved in the dismemberment case in Shangjing, did that really tell you how well you knew him?
This suddenly reminded Bai Song of something. When he was handling a case in Southern Xinjiang Province, the little girl at the end had a book they had compiled. Later, he asked Yan Yu to check at school and found out that someone had sold the book.
Could it be that this X also got hold of this book and studied it carefully?
Thinking of this, he suddenly realized that over the years, whether it was social media or online news, whether it was formal textbooks or the novels he wrote with Xu Fang, there were too many things that could reveal his character. If X was smart enough, he could indeed analyze a lot of things.
So far, he has had contact with X three times. Not only is X analyzing him, but he also has his own analysis of X. According to Bai Song's current idea, if there is someone who has come into contact with X and knows some things about him, such as Wang Shichun, then the image of X will be much more complete.
"Sir, your roast duck." Bai Song was just thinking about it when the waiter came over with two large plastic bags, which included six boxes of duck meat and three large boxes of pepper and salt duck racks, in addition to a bunch of sauces, pancakes, chopped green onions, etc.
Bai Song stopped thinking about these messy questions because he had already paid the bill in advance, so he went out and took another taxi to the Municipal Bureau.
In the car, he did not chat with the driver. Instead, he reflected on himself for a while and discovered many of his shortcomings, which was that he had always been too obsessed with perfection. His father-in-law once said something to him, and he gradually understood it.
When many senior leaders are doing things, they always give people an impression of being calm and unhurried, and they never delay the case at all. This is a kind of accumulation of experience. Bai Song feels that he is still far from it.
Thinking of this, when Bai Song went to the Municipal Bureau, he even walked slower after getting off the car.
This seemed to be the first time in all these years that he deliberately slowed down his walking speed.
The Municipal Bureau was very lively at this moment. When everyone saw Bai Song coming with roast duck, they all gathered around.
"Okay, that's nice," Wang Liang stared at the screen without turning his head, but he had already smelled the scent.
"What are you busy with so seriously?" Bai Song asked.
"I'm responsible for monitoring," Wang Liang said, "Hurry up, make me a roast duck and feed me one."
"Okay, no problem~" Bai Song said with a smile.
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