Translation

• 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

Synonyms

• 内行, 圆熟, 在行, 如臂使指, 娴熟, 得心应手, 懂行, 挥洒自如, 游刃有余, 滚瓜流油, 滚瓜烂熟, 烂熟, 熟, 熟练, 熟能生巧, 目无全牛, 科班出身, 稳练, 纯, 纯熟, 自如, 融汇贯通, 见长, 训练有素, 谙练, 运用自如, 运用裕如, 驾轻就熟