Flight Haneda Airport departs from Tokyo Haneda Airport at 02:15 and arrives at Tianjin Tianjin Binhai International Airport at 04:50.
The flighttime is about 3h 35m. The distance travelled ("as the bird flies"): 2504 Km. So the average speed is roughly 699 Km.
There is an 1 hour time difference between Tokyo and Tianjin