Tā zhǐgù yǎnqián de lìyì, tángláng-bǔchán, bùzhī huángquèzàihòu.
He cares only about the gain in front of him, like the mantis stalking the cicada - unaware of the oriole behind.
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From 《庄子·山木》 and 刘向《说苑·正谏》: a mantis crept up on a cicada, unaware that a yellow finch was stalking the mantis. Full form: 螳螂捕蝉，黄雀在后. Often invoked when warning someone chasing short-term wins to watch their back.
