lú​huǒ​chún​qīng

alchemical

炉火纯青 (爐火純青) lú​huǒ​chún​qīng
alchemical idiom
The literal stage in Daoist alchemy where the stove fire turns bright green, indicating the elixir has been successfully refined.
consummate idiom
Having reached the peak of perfection or mastery in a particular art, skill, or technique.

Frequency

Movie subtitles
0.240 per million appears in 0% of films
Written text
0.848 per million

Sources

Definitions
CC-CEDICT