You can also take the 9 17 special line and take the No.20 bus to Tianqiao, and the destination of the No.20 bus is Beijing Railway Station.
You can also take bus 6 16, 90 1 at Liangxiang Street and get off at Liuliqiao Beili, then transfer to bus 1 and get off at Beijing Railway Station East.
You can also get off at Liuliqiao and transfer to 300. Wait until Gongzhufen changes to the subway 1 line, then Fuxingmen changes to Line 2 and gets off at Beijing Railway Station!
That's how I left. I drive the subway now. I haven't tried it yet!