Christep...

As you are in Hong Kong, it may be different but from first hand experience I can tell you that if I want to buy an RTW tkt with One World starting in a country other than the U.S and purchase it in the U.S. it will be raised to the U.S. fare level. I am not making this up, but that is just the way it is. Most airlines will not take credit cards over the phone billed in countries other than the country of origin. Maybe you have a cousin or friend that takes care of these things for you in an airline office so you are not aware of these policies but raising the fare level to the same price of the country of sale is the very thing the Canada/Euro exemption is referrin to