Transit at Beijing

I booked my ticket from agent
Regina SK, Canada -> Vancouver (air Canada), then I have to stay there for more than 3 hours.
Vancouver -> BJ (air china), I just transit their to 4 hours
BJ -> Ho Chi Minh (Air China)
I don't know whether air Canada will transfer my baggages to Air China or I have to claim my package at Vancouver and then check in again.
Return:
Ho Chi Minh -> BJ (Air China), stay at there for 3hrs and 30mins
BJ -> Houston, TX (Air China)

And with that much layover time, will I make it to my connection flight?