Calculating by heart

Calculating by heart

Chinese idiom, Pinyin is j ì y á nx à NSU à n, which means careful research and calculation. From the epitaph of Zhang Fujun.

The origin of Idioms

In the epitaph of Zhang Fu Jun written by Fan Jun of Song Dynasty, it is said that "after the great cause of Ding, the production is getting worse and worse, and the Fu Jun has to study and calculate in order to manage the production

Idiom usage

Used as a predicate or object; used in writing.