Editing Infernal Affairs (section)

===Alternate ending===
An alternate ending for the film was shot in order to comply with Article 25 (7) of the Chinese Film Administration Regulations specifying that films cannot propagate obscenity, gambling or violence, or abet to commit crimes.<ref>S. Xu (2017) "The Curious Case of Chinese Film Censorship: an Analysis of the Film Administration Regulations". School of Journalism and Communication and the Graduate School of the University of Oregon. 32-44.</ref> In the original Hong Kong ending, Lau concealed his true identity as a triad spy and identified himself as a police officer to avoid punishment. Therefore, the original ending was deemed to promote criminal activity and injustice, and an alternate ending was filmed to make the film suitable for mainland China. In the alternate ending, Inspector Cheung discovers evidence of Lau's criminal activity and immediately arrests him when he gets off the lift. This alternate ending was shown in mainland China and Malaysia.<ref name="doi.org">H. Y. F. Choy (2007) "Schizophrenic Hong Kong: Postcolonial Identity Crisis in the Infernal Affairs Trilogy". Transtext(e)s Transcultures. 3: 52–66. https://doi.org/10.4000/transtexts.138</ref>