What should the passengers do if the flight is diverted to other cities?

If you alternate because of the weather, you can fly in a few hours. If there are alternate flights for other reasons, the airline will arrange other flights.

There are many reasons for alternate landing, mainly including air traffic control, poor weather conditions, non-acceptance of scheduled landing airports, poor weather conditions at scheduled landing airports below landing standards, and aircraft failure.

In the "Eight Objections" issued by the Civil Aviation Administration of China to ensure flight safety, it is clearly stated that "alternate landing" means that when landing conditions are not available for various reasons, the destination airport should land at the alternate airport, and flight safety should not be affected by blind forced landing. Alternate flight is a normal measure to ensure flight safety during aircraft operation.

The difference between alternate and forced landing:

Alternate airport refers to the airport where the aircraft landed outside the destination airport in the flight plan, while forced landing refers to the inability of the aircraft to continue flying or forcibly landing the aircraft that crossed the border without authorization or seriously violated flight discipline at the designated airport after getting lost, running out of fuel or serious failure of its mechanical system.

Refer to the above? Baidu encyclopedia-alternate