Korean Four-Character Idioms
전화위복
轉禍爲福
Word for word
“turn misfortune into fortune”
What it means
A setback that turns out to be a blessing.
When you'd use it
A cancelled plan that led to something better.
Example
그 실패가 전화위복이 되어 새 길을 찾았다.That failure turned into a blessing — I found a new path.