In "The Three Teams", the character of Yang Jiantao played by Li Chen is not very likable, but in fact, Yang Jiantao is a stable person, from beginning to end, he has not done a single unreliable thing. There is an explanation in the film that Yang Jiantao came from the provincial department, so it can be roughly inferred that he came to the city bureau to be the second captain of the criminal investigation, which belongs to sinking to the business position to temper and temper, which is a regular process before promotion. 
In the Municipal Bureau, the three major criminal investigation teams are specialized in handling major and important cases, so although they are at the same level, the three major teams are indeed the first to overwhelm the second team. When Cheng Bing paid for the supper stall, he bought it together with the three major teams, which can be seen how proud Cheng Bing is the captain of the three major teams. The members of the second team complained about being pressed, but Yang Jiantao did not complain, and after Cheng Bing paid for them, he also came over to thank him, calm, polite and thoughtful. Why? Because Yang Jiantao served as the second captain, he didn't want to compete with the three major teams, he went down to temper, not for merit but for no fault. 
In the film, there was a big conflict between the second and third teams, 921 After the burglary ** homicide occurred, the three major teams found clues to the suspects and rushed to their temporary residence to arrest them, which coincided with the second team's investigation in that area, police lights + sirens, of course, the birds were shocked. The three teams were furious about this matter, Yang Jiantao, as the captain of the second team, did not apologize, his attitude was very clear - your arrest is work, and their investigation is also work, you want to come here to arrest the suspect, why don't you say hello in advance, they can avoid it in advance? What did Cheng Bing say? He said that the three teams didn't close their eyes for three days and three nights, and finally found clues, so did they come to arrest them in the first place, or report to you Yang Jiantao? Cheng Bing's question seems to be powerful, but in fact it is unreasonable, they set off from the bureau all the way, did they give Yang Jiantao a ** communication? He didn't. They listened to Xiaoyudian's on-demand "Young Ambition Without Sorrow" in the car, and Cheng Bing also reminded the front and rear cars not to pull the siren, but he did not give Yang Jiantao a ** explanation that they were going to **arrest the suspect. It's not that Cheng Bing doesn't have time to fight **, he's just used to not taking the second team seriously, who makes the second team's business ability far inferior to their three teams? So Yang Jiantao led the second team to investigate in that area, is this Yang Jiantao's fault? This is obviously caused by Cheng Bing's lack of communication. 
Later, because of the torture to extract a confession from Wang Dayong to death, all the three teams were imprisoned. Six years later, Cheng Bing was released from prison, and when he went to the police station to go through the formalities, Yang Jiantao, who had been promoted to director, came over on purpose, because he was afraid that these children at the police station would not know Cheng Bing, in other words, he was afraid that the police at the police station would have a bad attitude towards the ex-prisoners and hurt Cheng Bing, a former policeman. Of course, there are also people in the barrage area who empathize with Cheng Bing, the three teams were crushed by the second team back then, and now the Yang team has become the Yang Bureau, but the Cheng team is a prisoner, how ironic! Some people even maliciously speculated that Yang Jiantao came over to set up the score of Director Cheng Bing. Yang Jiantao: Is it? I can't see this in the film, I only see that Yang Jiantao wants to help Cheng Bing arrange a job as a security captain, and he also mentions that Chen Ju instructed him before he retires to wait for Cheng Bing to get out of prison and arrange for him to get together with his old colleagues. What does it mean to gather together? In fact, it was covered with the affection of old colleagues to make Cheng Bing's life better after he was released from prison. It can be seen from here that Yang Jiantao takes the entrustment of the retired old leader to heart, and has already revealed Cheng Bing's disrespectful remarks to him, Yang Jiantao is affectionate, righteous and generous. 
After that, Cheng Bing and the five of them traveled all over the country to track down Wang Eryong, which was completely a personal action, and there could be no support, but according to their own mention of "Yang Jiantao is going to trouble Yang Jiantao again", it shows that Yang Jiantao often helps them. Indeed, there are some things that Yang Jiantao will come forward to say hello to the local **, which will be much more convenient. Looking at this matter from another angle, Yang Jiantao supported Cheng Bing in chasing the murderer and tried his best to help him within the scope of his authority. To sum up, Yang Jiantao's business ability is indeed inferior to Cheng Bing, but he is square-minded, well-tempered, and from the provincial department, his future should be a splendid and smooth road. 