What is the confirmation notice sent in Ctrip's order information?

Important: After clicking, a prompt will pop up to send a short message and fill in the number. After entering, you will receive a text message. The content of the short message has a confirmation number. You do not need to reply to this Ctrip confirmation message. You can log on to Ctrip. com to check the status of your order. It is the reservation confirmation number between Ctrip and the hotel. If you arrive at the hotel as scheduled but can't find the order, you can provide the confirmation number to the hotel for verification.