"钻牛角尖 (zuān niújiǎojiān)" refers to someone who wastes time and effort trying to figure out an insignificant or insoluble problem. Sometimes this idiom is used to describe a narrow-minded person.

Key Learning Point (Preview): 钻牛角尖 (zuān niújiǎojiān): to get into a dead end

Yìzhī lǎoshǔ zuāndào niújiǎojiān lǐ le. Tā pǎo bù chūlái, què hái pīnmìng wǎng lǐ zuān. 一只   [...]