Originally Posted by
xliioper
I checked fares to Asia and these are not the BE/non-changeable fares.
The non-changeable BE fares have an X in second to last letter of fare basis code. The non-refundable/changeable fares with 'O or G' in second to last letter say the following -

Exactly - and it's not limited to economy either. Looking through both published fares and my own receipts for recent/upcoming trips, I see the same types of restrictions on fares in business.