Wei is a company-grade officer rank used in some East Asian militaries, including China, Taiwan, North Korea and South Korea.

The same rank names are used for all services, prefixed by haijun (simplified Chinese: 海军; traditional Chinese: 海軍; lit. 'naval force') or kongjun (simplified Chinese: 空军; traditional Chinese: 空軍; lit. 'air force').

Ranks used in Chinese character-using countries