Although "Infernal Affairs" is a suspense film, it is not as brain-burning as other suspense films, but a rhythm that is first dull and then slowly advancing. I personally think that its charm is mainly the expression of the perfect plot and details of the movie, which gives the movie a tension. The movie's rich portrayal of the characters' hearts gives the audience a strong sense of substitution and makes the audience very much want to know the next plot. Another unexpected ending to the audience. A good movie is one that leaves the audience unpredictable. All of this is inseparable from a good plot, and the expression of suspense relies on a perfect plot.
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