We plan to travel to China in November. We want to exit China via the Trans-Siberian

and we can not buy these tickets until we arrive in Beijing (otherwise it's three times the price to buy online). Will they still process our visa even though I can not show an existing ticket? I did provide this information in my application. Also is it really necessary to pre-book hotels? Not everyone wants to travel on a package and pre-booked itinerary...