The urban novel is a genre that is widely used in online literature, but different countries or regions have different requirements for the review of different types of urban novels. Some countries or regions 'cultural supervision agencies may strictly review the theme, plot, and character setting of certain urban novels to ensure that these novels do not contain any content related to violence, prostitution, gambling, terrorism, anti-society, national security, etc. If urban novels contain inappropriate content such as promoting violence, hatred, discrimination, exploitation, oppression, etc., or depicting unhealthy interpersonal relationships, social classes, gender relations, etc., then these novels may be banned by cultural watchdogs. Some countries or regions 'cultural supervision agencies might also review the writing style, plot, and character setting of certain urban novels to ensure that the quality and literary value of these novels were not high enough to attract the attention and appreciation of readers. Therefore, urban novelists had to abide by the local cultural supervision agencies to ensure that their works did not contain any inappropriate content and abide by local literary creation norms and laws.