Traditional: 週期
周期 (zhōu qī) means “period; cycle”. It is an HSK 6 Chinese word (traditional 週期) in the HSK 3.0 vocabulary.
Practice each character:
月亮的运行周期是一个月。
Yuèliàng de yùnxíng zhōuqī shì yī gè yuè.
The moon's orbital cycle is one month.
Updated: 2026-05-27