I need to get from the east railway station to happy dragon hostel, beijing

Oh, you can just take a taxi to get to the hoteL.
The cab fare is around CNY 30 in the day time. This is the easiest way for you.

Or you can take bus no. 31 at North Jintai Crossing Station, get off at Jintai Road Station. Then take subway line 6 to Dongsi Station, Exit E. After that, walk northwest around 540 yards to get to.
You can choose the way you like.