Sorry if this is not the right thread for this. Wondering if someone can tell me if this is a valid routing.

YYZ-SFO
SFO-PVG (STOP)
PVG-BKK (STOP)
BKK-PVG
PVG-CDG
CDG-YYZ

It's a little backtracking with going back through PVG, but I did something very similar on a previous trip, and hope this might fall into a valid routing or something?

Also, since I am only using 6 flights, I'd love to add YYZ-LAS and back on the end of this trip, but I think that's probably pushing it?

Unfortunately I don't have a lot of flexibility this time, and the above itin is all I can find on my dates right now.