Hello, We would like to book some train tickets for a trip and we have some question:

The trip we'we planned is from the 5th of Agoust to the 20th of Agoust
- which is the best way to collect the tickets? Is it safe if you bring them to our hotel? There is the risk that the ticket get lost?
- we have to book 5 tickets per person, can we take all of them in the same hotel/place or we will take them in the different hotel of our trip?
- in the case we choose to collect the tickets at the railway station, can we take all of them together? It is easy to do or there is a long queque? There are windows for foreigners in station as Shanghai or Beijing?
-we will book the tickets as soon as possible when we'll recive your answer... Do you think we are on time or we could find some overbooking problem (Our trip are: shanghai-hangzou; huangshan-shanghai; Shanghai-Beijing; beijin-Guilin. G or D category except for the trip huangshan-shanghai); ??
- is it easy to have two seats side by side to having the trip together?
Thanks for all your answers
Kind regards,
FN