dredge for a needle in the sea
Looking for a needle in the East Sea, a Chinese idiom, Pinyin is d ō NGH ǎ IL ā ozh ē n, which means to take a needle from the bottom of the sea. It's from Ke Danqiu's Jing Chai Ji · wrong obituary.
The origin of Idioms
Yuan Ke Danqiu's jingchai Ji · wrong obituary: "son, I don't want to meet you in this life, unless I look for a needle in a haystack."
Idiom usage
It is difficult to deal with things. How lucky you are to meet Dade. If you are lucky enough to be greedy, how can you get it. (Hu Wenhuan, Ming Dynasty)
dredge for a needle in the sea
women who died in defence of their honour - sān zhēn wǔ liè