Problems with “ship from” variations

Hello, we have a need in our company. All products are delivered from China with DHL, no exceptions.
When we import a product with your plugin, it creates a variation called “ship from” and the list of countries that sell that product, e.g. “China, USA, Russia” etc. The problem as I said before is that we only sell from China, and manually delete the other countries of the variations of each product is very inefficient, we need to automate that to remove all variations that are not China, we did not find the option in the plugin, so we contact us here, thank you very much.