How do I get the invoice for an air ticket booked online with Ctrip?

There is one in the order that I want to be reimbursed, and you can apply for an invoice, fill in your location and it will be sent to you

Ctrip is responsible for mailing the ticket or invoice to you

After arriving at the destination, handle it at the airport counter, or fill in the address on Ctrip and mail it over, this will be charged

The machine factory refuses to handle it and asks to find and book a flight ticket

After arriving at the airport, go to the counter of the airline and print the itinerary, which can be used as a voucher for reimbursement.