We are from changs with train to go to Guangzhou. how we can go Beijing road?

From Changs? You mean from Changsha?
If you take the bullet trains, you will reach GZ South Railway Station. If you take the ordinary ones, you will reach GZ Railway Station.
But no matter what station it is, you can take the local subway line 2 to Haizhu Square Station and change to subway line 6 to Beijing Road Station easily.