HSK V7-9
Correct

画龙点睛

/ huà lóng diǎnjīng /
Strokes

Definition

to paint a dragon and dot in the eyes (idiom); fig. to add the vital finishing touch/the crucial point that brings the subject to life/a few words to clinch the point

Example

Definition
bring the painted dragon to life by putting in the pupils of its eyes―add the touch that brings a work of art to life; add the finishing touch
Definition
add a word or two to clinch the point

Related

画龙点睛