大海撈針 dà hǎi lāo zhēn

DEFINITIONS

  1. lit. to fish a needle from the sea
  2. to find a needle in a haystack (idiom)

CHARACTERS

大 dà big, great, vast, large, high
海 hǎi sea, ocean; maritime
撈 lāo scoop out of water; dredge, fish
針 zhēn needle; pin; tack; acupuncture