I just booked direct from China Airlines today and luckily, the booking class was N which earns miles (as per the eticket they sent me). When I book and after checking with ITA matrix, I just hope that I am booking the "right booking class" . I later learned from other members that Expedia shows the booking class when booking so I used it on my 2 other bookings.

Also, I could enter my SAS number on the booking on their website. It should be EBG----. I got an error first when I did not include the EBG, just the numbers.

It seems Aerolines Argentinas and Air Europa are the 2 airlines we need to book with SAS pts in order to be eligible.