qián​gōng​jìn​qì

to waste all previous efforts

Senses

前功尽弃/ 前功盡棄 qián​gōng​jìn​qì to waste all previous efforts

(idiom) all that has been achieved goes down the drain; all previous work being undone

References

synonym 付之东流/付之東流 前功尽弃/前功盡棄
synonym 尽付东流/盡付東流 前功尽弃/前功盡棄