Since the train K952/K949 starts from Shenzhen not your departure station-Guangzhou, the train tickets from Guangzhou to Guilin on the train can’t be booked online. However, you can choose to take the train K36/K37 originating from Guangzhou and make the booking around 10 days before your departure date. After payment, they will issue the tickets and deliver them to your appointed hotel before your check-in date. For the payment and other details, you can make an online booking enquiry directly.