上旬 shàngxún first third of a month
怎么记住“上旬”: 上 above + 旬 ten-day period = first third of a month.
汉字
用法
- The first ten days of a month (days 1-10) - 三月上旬 (sānyuè shàngxún) early March.
- Part of the set 上旬/中旬/下旬 that splits any month into thirds; standard in schedules, news, and forecasts.
- 旬 is a bound unit meaning a ten-day period, not used freely on its own in modern speech.