Correct
吃一堑，长一智
/ chī yī qiàn, cháng yī zhì /
Strokes
Definition
Fall into the moat and you'll be wiser next time (idiom); One only learns from one's mistakes.
Example
Definition
learn (sth) the hard way; experience teaches; learn from one's mistakes; know it to one's cost; wisdom grows out of experience; a fall into the pit, a gain in your wit