[Help Needed] Location based inventory levels

Hi everybody.

I currently manually ship orders domestically (US) and have a 3PL in China for international orders.

I recently set up location based inventory to have a better idea of inventory levels on these two locations.

So I have my main inventory (US) and a second inventory location (China). However, when I receive an international order, Shopify pulls the order from the main location.

Is there a way to trigger Shopify to pull only domestic orders from my main location and all international orders from my secondary location?

Any help is appreciated.

China company fulfillment app is set up wrong, need to change the correct fulfillment address