I have searched around the internet and havent found much info on AS booking HU stopovers. I wanted to see if anyone here had any experience.

Could anyone tell me if any of the following itineraries are valid (the online search does not show any results besides the individual leg's availability):

NYC-CKG-PVG, PVG-CTU. Stopover in PVG routing back to CTU.

CAN-CTU, CTU-NYC. Standard stopover in CTU.

NYC-CTU/CKG-PVG, TPE-CAN. Open jaw TPE-CAN. I saw on samchui.com that JL via AS allows openjaws as a stopover - wondering if that would work with HU.

Also, the website doesnt even show NYC-CTU, CTU-PVG to be a valid itinerary. That would be the most basic routing I would want to do.

Thanks all!