邮政 (yóu zhèng) literally combines 邮 (yóu), meaning 'mail' or 'post', and 政 (zhèng), meaning 'administration' or 'government'. Together, they refer to the official postal service — the national system responsible for collecting, sorting, transporting, and delivering letters, packages, and other mail. In China, this is primarily managed by China Post, a state-owned enterprise.

The term is used broadly in both formal and everyday contexts: you might see it on post office signs (邮政局), in official documents, or when discussing mailing services. It functions as a noun and rarely appears alone without modifiers — more commonly found in compounds like 邮政编码 (postal code), 邮政服务 (postal service), or 邮政局 (post office). While not a verb or adjective itself, it serves as the core concept behind many related terms in logistics and communication infrastructure.