qián​gōng​jìn​qì

wasted effort

前功尽弃 (前功盡棄) qián​gōng​jìn​qì
wasted effort idiom
to waste all one's previous efforts; for all past achievements to go down the drain

If we give up now, all our previous efforts will go to waste.

Frequency

Movie subtitles
1.28 per million appears in 1% of films
Written text
0.760 per million

Sources

Definitions
CC-CEDICT