The Tianjin River Cruise boats are the same kind as are used in Paris, and it certainly has a European feel. The best time to go is at night, when you can pass under the lighted Eye of Tianjin Ferris Wheel.
You can board the boat at the intersection of Ancient Cultural Street and Zhang Zizhong Road along the Haihe River. These are the times it runs:
Daytime Baoting Time: 09:00 – 16:30
Night Boating Time: 19:30 – 20:30
The cost is 80RMB during the day and 100RMB at night, per person.