@Train Tickets

I want to order some several train tickets on different dates.

I want to go on following routes:

Beijing-Shanghai
Shanghai-Xian
Xian-Chengdu
Chengdu-Guilin
Guilin-Guangzhou
Guangzhou-Hong Kong

Is it possible to buy all the tickets and get them in the same time?
How are the tickets delivered?

Thank you for your time.