What do you mean Ctrip will send text messages to friends when issuing tickets?

The reason why Ctrip sends a message to a friend when the ticket is issued is because the account registration contact information of the booking is the friend's mobile phone number. According to relevant information, when booking tickets in Ctrip, you can leave your own phone number, or the phone number of a friend, and the contact number of a friend. Ctrip reservation information will be sent to your friends by SMS.