(2) You can also purchase tickets at the ticket office at the railway station and pay in cash or by Alipay, WeChat, or UnionPay bank cards. Some railway stations also have self-service machines for ticket purchase. ■ Ticket change Foreign travelers can change your tickets at the 12306 website and APP, or the ticket office at the railway station. ■ Ticket refund Foreign travelers can cancel your tickets at the 12306 website and APP, or the ticket office at the railway station. Service fees may be incurred depending on the time of cancellation. ■ Railway station entry/exit and train boarding Foreign travelers can enter and exit the railway station through automatic or manual ticket check gates with the original valid identification documents used when buying tickets, and cooperate to complete ticket verification on the way. For details of relevant rules, please visit the 12306 website or APP, or call China Railway customer service hotline (12306) for consultation. 12306 website address: https:// www.12306.cn/en/index.html (II) Airplane. Foreign travelers can book tickets online on the airline's official APP and WeChat mini program, or other ticketing platforms. ■ Ticket purchase (1)You can buy tickets on the airline's official APP and WeChat mini program and pay with Alipay, WeChat, or UnionPay bank cards. (2)You can also buy tickets at the airport and pay in cash or by WeChat, Alipay, or bank cards following the regulations of the airline. ■ Ticket change and refund Foreign travelers can change or refund your tickets through the ticketing platform or at the airport. Fees may be incurred, which is subject to the regulations of the airline. (III) Metro. A total of 55 cities in China have metro lines. Foreign travelers can apply for metro passes at the metro station or use the Alipay APP to take the metro. 1. Foreign travelers can buy single-journey tickets at the ticket office or self-service machines at the metro station. Frequent travelers can apply for metro passes at the ticket office with your passports. You can make payments in cash or by WeChat or Alipay.