Hello, you could submit an online booking form first, and they would provide you the payment details via email. As I know, after the air tickets issued, you can get the boarding pass by showing your passport at the Business Service Counter for check-in. But for train tickets, passengers could aboard the train only with the paper tickets. For the Tel No., I found it listed on the left side of the page: https://www.travelchinaguide.com/china-flights/