To look on unconcerned without lifting a finger; to stay out of a matter and not get involved.

observer; bystander; spectator; someone who watches from the side without getting involved

to observe from the sidelines with a calm, objective, or critical eye

an outsider or onlooker often sees things more clearly or objectively than those directly involved; often used in combination with [[当局者迷|當局者迷|dang1 ju2 zhe3 mi2]]

to watch from the sidelines and do nothing; to refuse to get involved in a situation

to stand by and watch without helping; to remain uninvolved in a situation that requires action

The person involved in a situation is often confused, while an onlooker can see things more clearly and objectively; originally used to describe chess players versus spectators.