Does Cathay Pacific have an interline agreement with Bangkok Airways (PG)?

I am trying to determine if I can check my bags in all the way to Chiang Mai from DFW.

Flights are:
DFW - ORD on AA,
ORD - HKG - BKK (Bangkok) on CX,
looking at booking BKK - CNX (Chiang Mai) on PG.

In case it matters, Hong Kong is an overnight stay - arriving early evening then leaving mid-afternoon for Bangkok.

Thanks for any assistance / advice.