It seems to be a well-established tradition in Hong Kong that when you sit down at the table in a restaurant you use hot tea to wash the cups, bowls and chopsticks. The theory is that the water has been boiled, so it is safe.
Well, maybe, but what about the people who wash the bowls? Did they clean their hands first?
And if you can't trust the restaurant to provide you with clean bowls, what about the kitchen? Is it safe to eat the food?
All seems like nonsense to me.