Separate three from two
In Chinese idioms, Pinyin is f ē ns ā NBI é Li ǎ ng, meaning to say in detail; clear, clear. It's the same as "divide the stars". It's from the story of Niu Tianci.
The origin of Idioms
Laoshe's the twentieth book of Niu Tianci Zhuan: "what makes him more ashamed is that he is divided into three parts, whose is whose."
Analysis of Idioms
Synonym: divide the stars into two, divide the stars into two
Idiom usage
As a predicate, attribute, etc
Separate three from two
Take advantage of the situation - jiàn kōng héng píng
trace to the very source of sth. - qióng yuán shuò liú