Supplier order number

Hi, I am looking for a solution for my dolibarr supplier order.
Is it possible that the supplier order number depends on the country code from the customer?
for example:“US”) buys something. From the invoice I create a supplier order with the Number mask “Country Code”-{00000+1000}. In this case US-10001.
If a customer from China buys something, the supplier order has to be CN-10002.
For every sale I use the same supplier, no matter from where the customer is. So I can not use the partner type {tt} or the client id {cc} on the supplier order mask, because the supplier is always the same.

We had a similar issue, we wanted the project number being included in the purchase order number (concatenated). We ended up hard-coding this in to the PDF templates. I think it’s currently not possible what you want. It’s a nice feature request to have the ability to reference supplier order number by project number or country codes.