Why does Ctrip book a train ticket without the other party's phone number, and the other party can still receive a text message?

Protect personal privacy. If you book a train ticket on Ctrip, the other party will not receive your call, but will only receive a short message notification of the ticket from the railway customer service. This is because in order to protect personal privacy and prevent fraud, China Railway Customer Service Center stipulates that ticket information can only be sent to the ticket purchaser himself.