It is a famous aphorism about doing things in a down-to-earth manner and not to rush forward, otherwise you will overdo it and defeat the purpose.

Explanation: speed: fast; da: achieve. Refers to being too impatient and trying too hard to achieve the goal.

From: "The Analects of Confucius·Zilu": "If there is no desire for speed, there will be no small gains. If you have haste, you will not achieve anything, and if you see small gains, you will not achieve great things."

Antonym: accomplish it in one go

Grammar: complex sentence structure; used as attributives and clauses; with derogatory connotations