The word "人数" is formed through a direct and logical combination of two meaningful characters: "人" (rén), which represents a person or people, and "数" (shù), which represents number, count, or quantity. By placing them together, the concept fuses the subject ("people") with its measurable attribute ("number"), creating the composite idea of "the number of people". This formation is a straightforward example of conceptual compounding in Chinese, where the first character specifies the domain and the second character specifies the aspect being measured or described.