To commit adultery in an ambush
Chinese idiom, Pinyin is t ī f ú f ā Ji ā n, which means to expose and report bad people and hidden bad things.
Idiom explanation
Expose and report bad people and hidden bad things.
To commit adultery in an ambush
shooting two birds with one stone - yī jǔ liǎng quán
The school is short but the school is long - jiào duǎn liáng cháng