Hi, can you tell me how to book a train from Beijing to Harbin? Can I book online?

Yes, you can book online.
Sometimes I used this website to book the ticket. You can search the timetable of the trains from BJ to Harbin and then pick up the train you want to take. Then you can book. After that you can get an order number and you can use this order number and your passport to pick up the ticket at the railway station directly. It is very convenient.

Thank you LInda..
I'm planning to go to Harbin at 26 february 2014
Is there any chance I could see the ice sculpture?
Thank you

Yes, you can still see them.
Until the end of February, you can see the snow sculptures.