especially when the two liked the same woman and Leonardo left a child and both of them died in the end. For me, who only watched Infernal Affairs and not the sequel, this is the best ending . The
details are not good enough. Matt Damon (Andy Lau) does not have such a heart that he wants to change his ways and become a good person, and he is on the rooftop. That detail is not clearly explained. Leonardo as a policeman must arrest Matt's classic lines. I think that is the essence of Infernal Affairs.
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