鸿毛泰山
hóng​máo Tài Shān

comparative significance

鸿毛泰山 (鴻毛泰山) hóng​máo Tài Shān
comparative significance idiom
Literally light as a goose feather versus heavy as Mt. Tai; used to describe the extreme difference in the value or importance of things, typically regarding the significance of a person's life or death.

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Definitions
CC-CEDICT