Can I pick up a Shenzhen to Wuhan rail ticket in Hong Kong?

I have booked a ticket from Shenzhen to Wuhan on Tuesday 27 May. I plan to spend very little time in Shenzhen (quick overnight in Yantian to see Minsk World). I will be arriving in Hong Kong on 24 May. Can I pick up my ticket in Hong Kong, for example at Hong Hom station? What about at the LuoHu border crossing when I enter Shenzhen? Otherwise I will have to leave Yantian very early to go to Shenzhen North station and then wait to pick up the ticket there.