The meaning comes from the text
It is a Chinese idiom. The Pinyin is Yu á NW é NSH ē ngy ì, which means to learn from the text. It's from reading magazine, historical records 4 by Wang Niansun of Qing Dynasty.
The origin of Idioms
In the fourth book of historical records, read by Niansun, king of the Qing Dynasty, the saying goes: "if you are far away from the enemy, it means that the force of the crossbow is strong enough to be far away from the enemy." The case of Niansun: Xiao Sima was born out of his writing. From, when from millet. Shu and Lai Li Shu are similar, so Shu Chen is Lai. "
Idiom usage
As a predicate, object, attribute; used in an article, etc
The meaning comes from the text
the three parties concerned confront in court - sān cáo duì àn
The sky is high and the emperor is far away - tiān gāo huáng dì yuǎn