suí​zhū​tán​què

gains cannot offset losses

Senses

随珠弹雀/ 隨珠彈雀 suí​zhū​tán​què gains cannot offset losses

Literally "to shoot a sparrow with the Sui pearl"; describes using something of great value for a trivial purpose, or more generally, when the cost of an action far outweighs the potential reward.

References

synonym 随珠弹雀/隨珠彈雀 得不偿失/得不償失