not deviating a hair 's breadth
In Chinese, Pinyin is h á of à B à Shu à ng, which means that the description is not bad at all. From Zhu Zi Yu Lei.
Notes on Idioms
Hair: fine hair; hair: hair; cool: mistake.
The origin of Idioms
The fourteenth volume of Zhu Zi Yu Lei, written by Zhu Xi of Song Dynasty, said: "there are many principles in the heart, which are bright and accurate."
Analysis of Idioms
There is not the slightest error to a proper extent be perfectly accurate, absolutely sure, fit like hand in glove.
Idiom usage
It can be used as predicate and object, with commendatory meaning. The accuracy of this instrument is not at all satisfactory, otherwise the difference will be a thousand miles away. if you call your neighbor and ask him, then the meat will come back. It's not a bad thing to say that it's a few Jin. Pu Songling's strange tales from a lonely studio
not deviating a hair 's breadth
water flowing out in a trickle takes a long time to exhaust - xì shuǐ cháng liú
warning taken from the overturned cart in front - qián chē zhī jiàn