How collect the train ticket

Dear TravelChinaGuide, please advise the better way to collect train ticket, in case if I will buy it via your website online in advance (I need several tickets: Kunming-Lijiang; kunming-chongquing, shanghai-beijing and some others), so, is it possible to buy it via your website and collect all of them at e.g. Kunming airport? thank you in advance. Alexandra