HSK 7-9
得不偿失
débùchángshīthe gains do not make up for the losses (idiom)
为小利冒大险实在得不偿失。
Wèi xiǎo lì mào dà xiǎn shí zài dé bù cháng shī.
Risking so much for a small gain is not worth the loss.
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Appears across levels (7-9) in the HSK 3.0 word list.