Would this be a valid routing plz?

PEK-HKG
HKG-BKK
BKK-CDG
CDG-VIE (layover)
VIE-LHR (stop)
LHR-ORD
ORD-YYZ(stop)
YYZ-LGA (POT)
JFK - PEK

I'm worried that cdg-vie,and ORD-YYZ would be considered backtracking. Thanks.