Wu Xia is a gripping story about the dark side of human nature. There are several intriguing things that are worth nothing. First, Detective Xu Baijiu believes that the law is more important than humanity. His blind obedience to the law contrasts sharply with the corrupt officials accepting bribes, which is a political satire. Please note what happens to the villain at the end, which ridicules the unscrupulous legal system invented by humans. Second, the difference between humans and animals is highlighted. Please note that cows, horses, flies and worms are shown in the movie and respect for animals is emphasized. Moreover, in a fighting scene, Kara Hui's character can be seen through a cow's eye, which symbolically shows her ruthless character. Third, in some scenes, the candles glimmer in the darkness, which symbolically shows the struggle between good and evil in a human being.