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Before going to the airport, passengers should inquire about backup seats. If it's capable, please go through the flight backup formalities at the corresponding counter.

Passengers will fill in the backup-seat-booking applications at the airport ticket office.

Passengers will inquire 30 minutes prior the flight's departure about if the backup efficient.

If it's efficient, passenger will produce the valid identity certificates.

The booking clerk will make a ticket according to the passenger's valid identity certificates.

Pay money and take ticket.

(english.gov.cn October 20, 2006)