打著燈籠難找

Simplified: 打着灯笼难找

dǎzhedēnglongnánzhǎo ㄉㄚˇ ˙ㄓㄜ ㄉㄥ ˙ㄌㄨㄥ ㄋㄢˊ ㄓㄠˇ

    • so excellent that its like is very hard to find
    • one of a kind

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
carrying a lantern, still hard to find
Meaning
Describes a person, thing or chance so excellent it is very hard to find the like. Approving; similar to "you won't find another like it".

Sources