"Infernal Affairs" is not only very particular about the filming, but the story inside is also very well composed, with some new ideas. It has a lot more new things than the common Hong Kong police film. "Infernal Affairs" obviously did not pay attention to the previous action elements and popular violent visual effects of Hong Kong police films. It really walks the relationship between the two characters. This movie relies on logic to let the audience participate in it, and do a guessing game).
In "Infernal Affairs", Liu Weiqiang once again picked up the more common subject matter of marginal people in gangster movies, but he did not interpret it from the superficial meaning of the opposition between the underworld and the police. In addition to gun battles and actions, there is a lot of attention to the distortion of human nature in special environments. In addition to a large number of entertainment elements, the film also has some thought-provoking things. Compared with the common brotherhood in gangster movies, the potential spiritual lines given in the film's story have brought Hong Kong gangster movies into a new realm
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