I emailed them so many times. They did say only SIN-HKG is available but I cannot have it confirmed because the SET is not all available. And not only one person said that. Then, if by June 22 the SET is not available, the upgrade waitlist is canceled.

And I asked them what I should do if I want to confirm that 1 sector, then they suggested a one-way upgrade.

I hope I am not confusing anyone hehe ��