Hello, you can take the Intercity EMU Train from Tianjin to Beijing. There is still some distance from Xingang cruise port to the railway station, so you need to take a taxi. I'm not sure if the elevators are available at both train stations, but I suggest you have porter to carry your luggage at both railway station and the service charge is about CNY10.00 per piece. For the train schedule, try to serach it online from this website and you will get the relevant info.