Is there a shuttle bus from Capital Airport on Nov. 11 to the Cruise Ship Port?

Do you refer to Tianjin International Cruise Home Port? There is no direct public transportation. Upon landing, you are suggested to take long-distance bus to get to Tianjin Tianhuan Bus Station first. The duration is about 2.5 hours. After arriving, take bus no.48 to Huanghe Road first. Then take metro line 2 to Tianjin Railway Station and transfer to light rail line 9 to Citizen Square. Afterwards, just take a taxi to the cruise ship port. The cab fare is CNY 70-80.

Thank you. My other option is to take the shuttle bus to South Station from PEK. My flight arrives at 16:00 and the last train to Tanggu leaves at 20:21. Will I have enough time to make that train? Train tickets are sold on line and I wonder if that guarantees me a seat on the train? I would like to spend the night in Tanggu and board the ship the next day.
Nestor