







得不偿失 is a Chinese idiom (chengyu) meaning “the losses outweigh the gains”. What is gained cannot compensate for what is lost; it's not worth the candle. Literally, “Gains do not compensate for losses”.
During the Three Kingdoms period, Sun Quan of Eastern Wu occupied the six commanderies of Jiangdong. He wanted to expand his sphere of influence, so he summoned his officials to discuss attacking Yizhou and Qiongya.
All the ministers agreed to send troops, except for Lu Xun, the Right Protector-General, who believed that they should recuperate and strengthen their forces at that time.
Sun Quan did not adopt his advice and sent troops, achieving victory, but overall, the gains did not compensate for the losses.