Chinese Thank You Thank You At A Chinese Restaurant?

Thank you at a chinese restaurant? - chinese thank you

I noticed that often when I say thank you to the waiter in a Chinese restaurant where you pay a small serving or tea, they react with the host or other means, often, even when the 'English (typically when Stewart Age 30 +). Is there a way to say, thank you reply? When my father sed you tap the table with 2 fingers (index) cuz I saw a PPL in a Chinese restaurant, eatin dat what to do. But Iono Bout that