The Chinaman's chance

领导说她每天都在学英语，最近看波洛侦探系列，很多旧式英语说法，昨天就教我啥是： A Chinaman's Chance.

（This article needs additional citations for verification.）

Chinaman's chance is an American idiom first attested in 1903[1] meaning little or no chance at all, possibly as a reference to historical anti-Asian racism in the United States.

https://en.m.wikipedia.org/wiki/Chinaman%27s_chance

至此，看完 wikipedia解释，大叔无话可说而觉得哽咽