This film uses the well-known concept of "reanimation" as its subject matter, except that the "corpse" is not an already dead body, but rather the moment of using another person's body to reincarnate. In fact, I have always been skeptical of the view that human nature is inherently good. Humans are also animals, we are no more noble and pure than other animals on this planet. On the contrary, humans have learned to hide their animalistic baseness under the guise of civilization, appearing even more hypocritical and cunning. I am quite annoyed by some film reviews that link human greed with capitalism, are people in socialist countries more noble? This has nothing to do with the political system, it is just human nature. Stories like this are not new, both Chinese and foreign film industries have made many, but it does not affect the success of this film, because the most interesting part of this film is not the pretentious supernatural packaging, but the humor generated by the character identity switch. The police officer played by Tony Leung was paralyzed from the waist down during a robbery case, while the thug Li Xiuxian responsible for driving the criminals in the same case became a vegetative state after being shot. Tony Leung doesn't want to live the rest of his life as a cripple, and under the leadership of Wu Qianlian transformed after the wise old man's soul capture, he regenerates using Li Xiuxian's body. Unexpectedly, Li Xiuxian was originally a hateful scumbag, infamous in his hometown of Lantau Island. However, the new Li Xiuxian is smart, agile, and has a sense of justice, just watching how he repays debts and regains the affection of his three wives is highly entertaining. The sister played by Wendy Wong, who knows the truth, openly confesses her secret love for her brother, and the adult humor arrangement such as Tony Leung having to go to the bathroom every time he fantasizes about Li's women, is amusing without being vulgar, providing unexpected surprises. Li Xiuxian, who has always portrayed himself as a brave public servant, greatly showcases his comedic acting skills this time, even overshadowing Tony Leung who is skilled in comedy.