Drawing legs on a snake. (Ruining something by overdoing it.)
Tips
culture
The snake is the 6th animal in the Chinese zodiac. The idiom 画蛇添足 (drawing legs on a snake) means to ruin something by adding unnecessary details — from a story where a man finished drawing a snake first but lost a contest by adding legs.
culture
The Legend of the White Snake (白蛇传) is one of China's four great folk legends — a love story between a white snake spirit and a human scholar.