Correct

作壁上观

/ zuō bì shàng guàn /
Strokes

Example

Definition

watch the fighting from the ramparts—sit by and watch; be an onlooker/by-stander

1
men
他们
chǎo
de
kāijiāo
不可开交
  
,
yào
zhìzhǐ
制止
  
,
néng
zuōshàngguàn
作壁上观
  

They are quarrelling fiercely. You should go and stop them rather than sit and watch.