「爐火純青」

(pos:形容詞)
<explanation>
yue:形容技藝高超，去到極致
eng:to have reached high perfection or complete mastery; literally: the stove fire is pure blue
<eg>
yue:影帝不愧為影帝，演技爐火純青，令人拍案叫絕。 (jing2 dai3 bat1 kwai5 wai4 jing2 dai3, jin2 gei6 lou4 fo2 seon4 cing1, ling6 jan4 paak3 on3 giu3 zyut6.)
eng:The best actor truly lives up to his title, with his masterful and breathtaking acting.
<eg>
yue:佢苦心鑽研釣魚技術，不斷實踐，終於達成爐火純青嘅境界。 (keoi5 fu2 sam1 zyun3 jin4 diu3 jyu2 gei6 seot6, bat1 dyun6 sat6 cin2, zung1 jyu1 daat6 sing4 lou4 fo2 seon4 cing1 ge3 ging2 gaai3.)
eng:He has devoted himself to studying fishing techniques and kept practising, eventually reaching perfect mastery.