7700,
They won't be new controllers.HKCAD isn't hiring expats,so they probably have run out of offices to hide in.
Unless they smuggled them in on the QT.
Talking of Americans,that highlighted one of the problems there.There was no standard way of doing things.All the nationalities working/co-ordinating their way,and the locals stuck in the middle.Also locals co-ordinating in Cantonese.That was/is a big
because English speakers cannot monitor what is being said.The worse CRM/TRM possible.