画龙点睛 (畫龍點睛) huà lóng diǎn jīng

huà lóng diǎn jīng set phrase to paint a dragon and dot in the eyes
Domain: Idiom 成语
Notes: to add the vital finishing touch (CC-CEDICT '畫龍點睛'; CCI '画龙点睛', pp. 53-54; Guoyu '畫龍點睛')