Why did Li Fei's father become an undercover in Operation Icebreaker?

I think the reason why Li Fei's father became undercover may be the death of Li Fei's mother. Zhao Jialiang wanted to find the real murderer or catch the drug dealer at once, so he went undercover. Lurking among drug dealers, judging from Zhao Jialiang's behavior, although he is a gangster, he has never done anything out of line and has a bottom line.

It is understood that the ending of Zhao Jialiang in "Action to Break the Ice" is that in order to protect Li Fei and complete the final task, he saved Li Fei himself but put his life in it. On the whole, this ending is still very distressing. Li Fei's biological father is not Li Weimin, but Zhao Jialiang. When Li Fei was very young, his mother died tragically, and then his father disappeared. Zhao Jialiang entrusted his son to Li Weimin and went undercover himself. In the ending, Li Fei finally knew who his father was, but his father died. This is cruel to Li Fei.

Zhao Jialiang is not a responsible father, but he is a qualified father. For the safety of his son Li Fei, he is willing to be a shady undercover and find out the murderer of his wife. Over the years, Zhao Jialiang has always paid attention to Li Fei's every move.

Although Zhao Jialiang is not a bad guy, he abandoned Li Fei and never even accompanied Li Fei. However, in the end, unfortunately, Zhao Jialiang was finally killed by Lin Can. This scene is really worrying. But the person who is more worrying and even annoyed than this is Li Fei. When Zhao Jialiang died, he couldn't hear Li Fei calling himself dad. Finally, when Li Fei faced Zhao Jialiang's body, he still used the word "he" when describing Zhao Jialiang. Li Weimin couldn't stand it, but Li Fei still said, "I can't say it, it's too awkward.". He also brazenly said: "Now lying here, you don't even give me a chance to say sorry."