Flight Guangzhou Baiyun International Airport departs from Guangzhou Guangzhou Baiyun International Airport at 12:30 and arrives at Vancouver International Airport at 07:55.
The flighttime is about 10h 25m. The distance travelled ("as the bird flies"): 13900 Km. So the average speed is roughly 1334 Km.
There is an 15 hour time difference between Guangzhou and Vancouver