Minors can use the account book, and adults are fine. The national airport temporary boarding certificate system has been launched. The mobile phone operates the "Civil Aviation Temporary Boarding Certificate" to obtain an electronic anti-counterfeit QR code, and check-in, security check, and boarding with the QR code; Go to the airport police station to issue a temporary boarding certificate on the spot...<br/><br/>Help you, please click the green [Accept]!