钻冰取火

Explanation: Compared to no avail. 　　Source: "Ridicule the whole Yuan Dynasty Putianle style" ice drill to make fire every sister, mother mountain every means to sell mill. " Thesaurus:  Knock the ice to fire, seek a hare in a hen's nest, draw water with a bamboo basket; all in vain, ask the way from a blind person, Dao in the blind, Drilling the ice to fire, Zuanhuodebing, Yuanshanqiuyu, Yuanmuxiyu Antonym Group:  very easily obtainable, acquire sth.easily, Hand to cite, be sure to succeed easily, as easy as taking sth. out of one's pocket, have full assurance to get go after an easy prey as one who catches a tuttle in a jar, go on [upon] the scamp