Learn from others
As a Chinese idiom, Pinyin is zh ě nx í Gu ò sh ī, which means that the army can cross the river from a bridge as safely and easily as on a pillow. It comes from the biography of Zhao Chongguo in the book of Han by Ban Gu in the Eastern Han Dynasty.
The origin of Idioms
Ban Gu's biography of Zhao Chongguo in Hanshu of the Eastern Han Dynasty said: "in order to control the huangkai middle road bridge, you can reach the fresh water to control the western regions. It is believed that it has a great power, and you can pass the division on the pillow. It's the eleventh year."
Idiom usage
As an object or attribute; used in military affairs, etc
Examples
If you want to cross doubt, you should use a floating bridge. Wei Yuan, Qing Dynasty
Analysis of Idioms
To return a teacher to a pillow
Learn from others
Take the essentials and cut them out - jǔ yào shān wú
would not explain unless one is desperately anxious to learn - bù fèn bù qǐ