Tiajin Cruiseship Port Tianjin Light railway Tianjin-BejingSüd

Hello we'll arrive at Tianjin Internainal Cruise Home Port on 24th of June 2016; then we want to go to Donghai Road by taxi and than by Tianjin Light railway (Metro Line 9) from Donhai Road to Tianjin railway Station. Is this the same railway station, from where is the Express ride to Beijing south starting? Tinjin West? I want to buy the tickets from you.