Good and evil
He said to kill the enemy to win. Birds are the same as "catching".
Idiom explanation
It is still said that killing the enemy will lead to victory. Birds are the same as "catching".
Idioms and allusions
[source] biography of Chen Tang in Hanshu: "today's country has no Emperor Wen's thrifty and rich livestock for many years, and no Emperor Wu's minister who recommended to be a hero and an enemy. It has a unique Chen Tang ear!"
Discrimination of words
Kill the enemy to win
Used as a predicate or attributive; used in writing
Good and evil