- 学前期 xuéqiánqī preschool ageThe period of a child's life from age three until they start primary school, considered a critical stage for intellectual development.
- 史前期 shǐqiánqī prehistoric periodthe period of time before written history was recorded
- 癌前期 áiqiánqī precancerous stagethe stage preceding the development of a cancer; precancer
