The Chinese word "邮局" (yóujú), meaning "post office", is formed through a logical compound of two characters: "邮" (yóu), which signifies anything related to mail, posting, or postal services, and "局" (jú), a common suffix for an administrative bureau, office, or department. Together, they create a precise and transparent term where the first character specifies the function (postal matters) and the second character defines the type of establishment (an official office), resulting in the straightforward compound "postal bureau" or "post office".