中文 Chinese

• 爐火純青
• 炉火纯青

英文 English Explain:

• lit. the stove fire has turned bright green (allusion to Daoist alchemy) (idiom)
• fig. (of an art, a technique etc) brought to the point of perfection

爐火純青 炉火纯青 English Pronunciation:

• [lu2 huo3 chun2 qing1]