Correct

夜长梦多

/ yè cháng mèng duō / 
Strokes

Example

Definition

a long night is fraught with dreams—a long delay may mean trouble

1
Wǒmen
我们
bìxū
必须
mǎshàng
马上
xíngdòng
行动
  
,
fǒuzé
否则
huì
会
yèchángmèngduō
夜长梦多
  
。

We must take action at once. Otherwise something untoward may happen.