What does it mean to pre-transmit the contact information of booking train tickets online?

14. What if the verification result of registered users and common contacts (passengers) is "pre-passed"? \ x0d \ x0d "Pre-Pass" refers to valid passports that can be used according to regulations, passes for Hong Kong and Macao residents to and from the mainland, registered users in mainland travel permit for taiwan residents, and ordinary contacts (passengers), whose identity information has been pre-checked at the ticket window of the station. \x0d\ x0d "pre-pass" registered users can only add valid passports, Hong Kong and Macao residents' passes to and from the mainland, and common contacts (passengers) in mainland travel permit for taiwan residents, and the total number of common contacts (passengers) under their names is generally less than 65,430. Online ticket purchase, ticket change, refund and other services can be handled normally for ordinary contacts (passengers) who have passed, applied for inspection and pre-passed, but the maximum number of tickets purchased by ordinary contacts (passengers) who have applied for inspection is 4 (including ticket change and refund). \x0d\\x0d\ requires the national authentication institution to verify the identity information of "pre-passed" registered users and common contacts (passengers) again. If it passes, the authentication status will be changed to "Pass"; If it fails, the authentication status will be changed to Failed.