The theme of the movie is reflected in the title of the movie and the final scene of the movie: aerial shots of the bridge connecting the island and the tall buildings on the island.
In order to live in the city, the police villains need to commute 4 hours a day to protect the city that does not belong to them. The police are like this, and so are most people on the island (because the island is connected to 21 bridges to protect so many People can come to the island on time every day to work and leave the island to live)! Even if the black police in the 85th Bureau are caught today, there will still be such a black police tomorrow, because the root cause of the police turning black has not been eliminated, and the root cause of letting other people take risks and break the law has not been eliminated.
The above point of view may only be recognized by some people who are not the protagonist in the film. The meaning of the film is reflected in the realistic meaning. It is inconvenient to say here because it may prevent the film review from being published.
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