Collection of Tickets at Beijing Railway Station

Hi,

If I book from TravelChinaGuide, how do I indicate that I want to collect them from the Beijing railway station? (There seems to be no option to self collect at the railway station)

I have booked for the international K3 and it will be sent to my hostel in Beijing. But for the K1302 (Manzhouli to Beijing), there may be no delivery service available in Manzhouli. Hence, is it possible to collect them from the Beijing railway station instead? (I will leave Beijing in mid June and arrive at Manzhouli in late June)