The Chief of Police of Beijing is the character that the author uses to give an opinion that might direct us toward the theme. In this story, the two main characters are the man from Chongqing and the Chief Police of Beijing. The man from Chongqing is more of a dreamer, and he is looking for his fortune. However, the reader has no way of knowing how this fortune is to be acquired. The person who points the reader towards the eventual outcome, and thus towards the theme, is the Chief of Police of Beijing when he describes his own dream.
As it turned out, the narrator accidentally buried the cat inside the wall when he was sealing his wife in the wall. In the end, his distorted view of reality and his overconfidence is the reason why he is caught