The term "分局" is a standard Chinese compound noun formed through a straightforward modifier-head (偏正) structure, where the first character "分" (fēn), meaning "to divide" or "branch", acts as a modifier specifying the type of the second character "局" (jú), which means "bureau" or "office". Therefore, the combined meaning is "a divided or sub-bureau", explicitly referring to a branch office or local subdivision of a larger administrative or organizational entity, such as a police precinct ("警察分局") or a local tax bureau. This formation is logically semantic and highly productive in Chinese for creating institutional terminology.