千慮一得

Simplified: 千虑一得

qiānlǜyīdé ㄑㄧㄢ ㄌㄩˋ ㄧ ㄉㄜˊ

    • a thousand tries leads to one success (idiom, humble expr.) Even without any notable ability on my part, I may still get it right sometimes by good luck.

Character by character

Sources