钻牛角 (鑽牛角) zuānniújiǎo

zuānniújiǎo noun honing a bull's horn; to waste time on an insoluble or insignificant problem; to bash one's head against a brick wall; a wild goose chase; a blind alley
Domain: Modern Chinese 现代汉语
Notes: Same as idiom 钻牛角尖 (CC-CEDICT '鑽牛角')

Contained in

• 钻牛角尖(鑽牛角尖) to penetrate into a bull's horn; to waste time on an insoluble or insignificant problem; to bash one's head against a brick wall; a wild goose chase; a blind alley