总部 (zǒngbù) literally means 'general department' — 总 (zǒng) conveys 'overall', 'central', or 'head', and 部 (bù) means 'department' or 'division'. Together, they refer to the main administrative center of an organization — where top-level decision-making, strategic planning, and coordination occur. It is most commonly used for large companies, NGOs, government agencies, or international organizations.

This term implies authority, centrality, and operational control; it’s not used for small local offices unless they function as the primary leadership hub. Headquarters may be located in a major city like Beijing, Shanghai, or New York, and often house executive leadership, finance, HR, and corporate communications. While 总部 can appear in formal writing and speech, it carries a neutral-to-formal register — you wouldn’t use it casually to describe a friend’s home office.