Transiting from Tianjin Port to Beijing International Airport same day

Hi, we are flying from Perth (W. Australia) to Hong Kong for a 7 day cruise embarking from Hong Kong Seaport to some of the ports in Japan and finally arriving and disembarking at Tianjin Seaport (China) at 7:00 AM to catch our onward flight back to Perth (Australia) at 4:30 PM from Beijing International Airport on the same day. Do we need a visa for this transit process?? Are we provided with a 24 hour transit at the disembarking Tianjin Port upon arrival or do we need to acquire entry permit for this transit between Tianjin Seaport to Beijing Airport before we leave from Perth (Australia).
A clarification on this issue is much appreciated. Thanking you.