HSK 7-9
画蛇添足
huàshé-tiānzúlit. draw legs on a snake (idiom); fig. to ruin the effect by adding sth superfluous; to overdo it
删掉这段才不会画蛇添足。
Shān diào zhè duàn cái bú huì huà shé tiān zú.
Removing this passage avoids adding something superfluous.
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Appears across levels (7-9) in the HSK 3.0 word list.