Invoice numbers

I have a branch in China and I'm wondering how others doing business
in China handle the VAT invoice number. The invoices are purchased
with a pre-printed VAT number on the document and that's is what local
customers use to pay. I need to be able to tie that number into
Vantage, but still be able to create invoice for customers outside of

Anyone have any suggestions??

Cindy House
Corporate Controller
GTech Precision