打攻坚战

Traditional (Taiwan): 打攻堅戰

dǎgōngjiānzhàn ㄉㄚˇ ㄍㄨㄥ ㄐㄧㄢ ㄓㄢˋ

    • to tackle a very difficult task with a concentrated push

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
to fight a battle against a fortified position
Meaning
To tackle a very difficult task with a concentrated push. Approving, used in official or work contexts.

Sources