literally "Zhang Fei threads a needle"; a two-part allegorical saying meaning that because the legendary warrior Zhang Fei had huge eyes and the eye of a needle is tiny, he could only stare at it; describes people staring at each other in bewilderment, having no idea what to do, as in the phrase 大眼瞪小眼 dà​yǎn​dèng​xiǎo​yǎn