It's pretty much a pet fair of sorts not limited to just bettas but Asian Betta Alliance attends it. They have a registration booth and either the seminar happens there or on a separate date. There are pet expos usually around December so I'm planning to go to one.
I'm looking at show types since I've had a CT before that looked like a tattered pompom in the absence of fin damage so I want a nice even spread and if possible a cross ray. I've looked at the commercial sellers and their stocks don't really appeal to me - most have rays that are too thin or are already curling.
If I can't find the fish I want at least I can be directed to someone who has what I'm looking for.