Our cruise ship Diamond Princess will arrive in Tianjin China 4am. We need to get to Beijing and catch the flight at 6pm. We want to take the bullet train from Tanggu railway station to Beijing. The first bullet train is scheduled for 8:29am and the next one to Beijing is 12:30pm. How early do we need to leave the ship to catch the first bullet train at 8:29am? If we should miss the first train, may we use the same ticket for the next train at 12:30pm? Or should we take a chance and get tickets only after we arrive at Tanggu railway station? How long is the taxi ride from Tainjin Port International Cruise to Tanggu railway station? Or is it better to take a taxi directly to Tianjin Railway Station? How long is the taxi ride from Tainjin Port International Cruise to Tainjin Railway Station for the bullet train? Is it true that one need to arrive the bulletin train station one hour earlier than the train schedule to leave? The train station has to check all security issues? Thanks so much.