The word "中部" is formed by directly combining two existing characters, each carrying its own core meaning, to create a new, composite concept. The first character, 中 (zhōng), fundamentally means "middle", "center", or "central". The second character, 部 (bù), carries the meaning of "part", "section", or "region". Their combination is conceptually straightforward: the "middle" (中) "part" or "section" (部) naturally yields the meaning of "central region" or "middle section", referring to an area that is centrally located within a larger whole.