The information needed to write an urban novel included but was not limited to the following aspects: 1. Basic knowledge of society and human development: urban novels are usually set in cities, so they need to understand the development of cities and human history, including urban development, modern, and global aspects. 2. Description of urban life: urban novels need to describe the characteristics and details of urban life, such as lifestyle, social activities, business economy, culture and entertainment. 3. Description of urban characters: urban novels need to describe the character, background, experience, and behavior of various characters, including city residents, professionals, foreign tourists, etc. 4. Description of urban love: urban novels usually involve love and marriage, so you need to understand the characteristics and types of urban love, such as romantic love, love at first sight, secret love, blind date, etc. The legal and ethical issues of urban life: urban novels usually involve legal and ethical issues such as crime, disputes, contracts, inheritance, etc. Therefore, you need to understand the relevant legal and ethical knowledge. 6. The structure and plot design of urban novels: Writing urban novels requires a good structure and plot design, including the beginning, ending, climax, and ending. The above was the information needed to write an urban novel. Of course, it still needed to be adjusted and modified according to one's creativity and style.