前期 literally means 'front period' — 前 (qián) means 'before' or 'front', and 期 (qī) means 'period', 'stage', or 'phase'. Together, they refer to the early or initial part of a process, project, development, or time span. It emphasizes the beginning portion before major activities or outcomes unfold.

This term is commonly used in formal, academic, business, or planning contexts — for example, when discussing project timelines, historical periods, disease progression, or life stages. Unlike casual terms like 开头 (kāitóu, 'beginning') or 一开始 (yī kāishǐ, 'at first'), 前期 carries a sense of structured division within a larger timeframe and often implies preparatory or foundational work. It frequently appears in compound phrases such as 前期准备 (qiánqī zhǔnbèi, 'preparatory work') or 前期调研 (qiánqī diàoyán, 'initial research').