If some one pores tea into your cup you can either just say nothing, say thank you or you can thank by tapping two times with the finger on the table.
And if the pot seems to be empty, you can leave it open. It signals that the pot is empty and the waiter will refill it.
That's very interesting because tapping on the table or say nothing sounds rude to me.
AntwortenLöschenSo I probably would say "Thank you." all the time :D