Correct

毁于一旦

/ huǐ yú yīdàn /
Strokes

Example

Definition

be destroyed in a day/moment; be wiped out overnight

1
Chuí
chéng
zhī
gōng
  
,
kǎi
huǐdàn
毁于一旦
  

How can we allow what is soon to be a success to be ruined overnight?