HSK 7-9
凤毛麟角
fèngmáo-línjiǎolit. as rare as phoenix feathers and unicorn horns (idiom); fig. few and far between
精通这门古技艺的人凤毛麟角。
Jīng tōng zhè mén gǔ jì yì de rén fèng máo lín jiǎo.
People who have mastered this ancient craft are few and far between.
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Appears across levels (7-9) in the HSK 3.0 word list.