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Open the tool →当行本色 (dāng háng běn sè) is a Chinese idiom (chengyu) meaning “to demonstrate true professional expertise”.
当行本色 is pronounced dāng háng běn sè in Mandarin Chinese.
Literally, 当行本色 means “True colors of an expert; inherent quality in one's field”. It is used to mean “to demonstrate true professional expertise”.
当行:内行。指内行并且是本来面貌。后亦指精通本行,而且成绩特别突出。