鲜为人知 xiǎnwéirénzhī rarely known to anyone (idiom)
rarely known to anyone (idiom); almost unknown; secret to all but a few
How to remember 鲜为人知: 鲜 fresh + 为 for + 人 person + 知 know = rarely known to anyone (idiom).
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How it is used
- Idiom: little known to the public - 一段鲜为人知的历史 (yí duàn xiǎnwéi rénzhī de lìshǐ) a little-known chapter of history.
- Note the reading xiǎn (rarely) here, not xiān (fresh); 鲜 = seldom.
- Written register; introduces obscure facts or hidden stories.