I've had about 7 goose breeds and my Africans were always the loudest followed by my Embdens.
My chinese were the loudest if they were the dominant of all my geese and they were loud! Once they weren't dominant anymore (gander fights) they were back down to being quite again.
So it has a lot to do whose boss
If you are only going to have Chinese they most likely will be loud
I have two chinese..there not that loud...i think it depends on how many you have.