次长 (cìzhǎng) means "deputy chief" or "vice minister," referring to a senior official who ranks just below the head of a department or ministry. It is a formal title used in government and organizational contexts.
外交部次长出席了今天的新闻发布会。
Wàijiāobù cìzhǎng chūxí le jīntiān de xīnwén fābù huì.
The vice minister of foreign affairs attended today's press conference.
这位次长负责处理对外贸易事务。
Zhè wèi cìzhǎng fùzé chǔlǐ duìwài màoyì shìwù.
This vice minister is responsible for handling foreign trade affairs.
次长代表部长参加了国际会议。
Cìzhǎng dàibiǎo bùzhǎng cānjiā le guójì huìyì.
The vice minister attended the international conference on behalf of the minister.