Theme refers to the materials used in the theme of the content of the work; Literary creation refers to taking some aspects of social life as writing materials. It also refers to the material used by writers to express the theme of their works, usually referring to life events or life phenomena that have entered the works through concentration, selection and refinement.
Genre refers to the types and styles of all artistic works, and often refers to the classification of literary works, which can be divided by various standards.