The text discusses the rules and procedures for ticket refunds and changes for passengers of China Airlines. It mentions that refunds must be requested before the flight departs and may incur fees depending on the original ticket rules. Passengers can also change their tickets within one year without incurring fees, but changes to certain seat classes may result in additional fees. Non-voluntary refunds may be available for delays or cancellations caused by the airline. Passengers can request refunds through the airline's website for tickets bought online, but must contact the local office for ticket purchases made over the phone or in person. The details and fees vary depending on the type of ticket and situation.