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
men
我们
必须
shàng
马上
xíngdòng
行动
  
,
fǒu
否则
huì
chángmèngduō
夜长梦多
  

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