Flight Guangzhou Baiyun International Airport departs from Guangzhou Guangzhou Baiyun International Airport at 14:15 and arrives at Tokyo Haneda Airport at 19:45.
The flighttime is about 4h 30m. The distance travelled ("as the bird flies"): 3038 Km. So the average speed is roughly 675 Km.
There is an 1 hour time difference between Guangzhou and Tokyo