dà​gōng​gào​chéng

accomplished

大功告成 dà​gōng​gào​chéng
accomplished idiom
to bring a major project, task, or goal to a successful conclusion

After months of collective effort, the project has finally been successfully completed.

Frequency

Movie subtitles
1.22 per million appears in 1% of films
Written text
1.32 per million

Sources

Definitions
CC-CEDICT