Flight Tan Son Nhat International Airport departs from Ho Chi Minh City Tan Son Nhat International Airport at 02:35 and arrives at Shanghai Pudong International Airport at 08:00.
The flighttime is about 4h 25m. The distance travelled ("as the bird flies"): 1901 Km. So the average speed is roughly 430 Km.
There is an 1 hour time difference between Ho Chi Minh City and Shanghai