You have come to Thailand on a 1 year Non-O retirement, and when you come here, how many months/days does the stamp you get in the airport when you arrived say?
I arrived in Thailand, Bangkok two days ago from Sweden, (connected in Dubai).
When we landed in Bangkok, just outside the airplane it was people with signs say “connecting flights to Chiang Mai this way”, so I guess it should be possible with test and go in CM in some way 😊
Me and my friends did in exactly the same way, if the Qr-code is in good quality and “cut in the right way”, you will pass in a few minutes by a robot.