画 龙 点 睛
huà lóng diǎn jīng

Fill in the eyes to a painted dragon.

A finishing touch. It is said that a famous Chinese painter painted four dragons without eyes. When asked, he explained that with eyes they would fly away. Incredulous, his friends insisted on his filling in the eyes. Sure enough, as soon as the painter added eyes to two of the dragons, they started flying away. This proverb is most often used to describe a situation wher one who uses succinct remarks to summarize the gist of an article or a speech.

Antonym:

画 蛇 添 足
huà shé tiān zú

Add legs to the snake one has just painted. Do something that is totally unnecessary and spoil what you already have done.