dà​hǎi​lǐ​lāo​zhēn

to look for a needle in a haystack

大海里捞针 大海裡撈針 dà​hǎi​lǐ​lāo​zhēn
to look for a needle in a haystack
to fish for a needle in the ocean; a metaphor for something extremely difficult to achieve or nearly impossible to find; often used as the first half of a two-part allegorical greeting (xiehouyu) where the second half is 难上难 nán​shàng​nán

Cross-References

See