Need URGENT help - stopping sales!

From my supplier, I have the opportunity tot ship from both China & within the EU. People inside the EU would probably prefer France, while US markets would prefer China (I can't ship from France to the US). How do I go about that on my product page?
Thanks in advance!

There are many plugins to control different warehouses for your inventory, have a look at katana or Z inventory manager for example.

Don't know what the fuss is. Just state that on the product page. For example,

Delivery: EU // 3-5 days. USA // 12-17 days.

Or use shipping classes and show that on checkout.