Counting several foreshadowings in "The Detective", who is the black policeman?

"Iron Detective" is not just a cop film, there are a lot of power fights in the play. In the year of promotion, the Chief of Police and the Deputy Chief of Police will retire, and more than 40 chief superintendents want to be promoted. Wan Xihua successfully transferred Jian Guoshu to the police academy in a power struggle with Jian Guoshu. Soon after, the two of them can still reconcile as before, helping each other, like a modern version of Gongdouju?

"Iron Detective" has been aired for fifteen episodes so far, and the plot is wave after wave, very exciting. The battalion commander not only rescued He Liqiang, but also wanted to take the opportunity to kill You Binggao. In the end, You Binggao successfully escaped and persuaded the battalion commander not to kill him again. However, the battalion commander has never regarded him as his own. He just appreciates You Binggao's strength. I think soon, the battalion commander will kill You Binggao when he sees the right time. However, the drama "Iron Detective" still left a lot of suspense. The editor below will help you analyze, and Iron Detective still left those suspense.

The first suspense is when the coyote killed Officer Wan, did the battalion commander show up? Whether it was the coyote or the battalion leader who killed Police Officer Wan. The editor thinks where the battalion commander was probably at that time.

The second suspense, the battalion commander saved He Liqiang so easily, did the black police reveal information to him. So who is the black police? I think everyone is most concerned about this issue. The editor thinks that this black police officer may be Chen Yusen, who is the chief superintendent. We can analyze that this black police officer must know the police force very well, and his rank in the police force is not low, otherwise he will not know the police force. So much information. Chen Yusen's leg injury may be the cause of Chen Yusen's blackening.

The third suspense, who is the murderer of the sulfuric acid case? Wan Xihua suspected that it was done by an insider of the police force, so he wanted to lure the snake out of the cave, but this was related to the safety of many people, and was stopped by Shang Sian. So is there any relationship between this police force and the black police, or is this police force just throwing sulfuric acid?

The fourth suspense, Wan Xihua told the Commissioner of Police that he had successfully sent an undercover agent to contact the battalion commander and their group. So who is this undercover agent? I have thought about it for a long time and never thought, which undercover do you think is who? Comments are welcome.