In the AAI industry, mining machines gradually upgrade in the form of 'thermal mining machine → electric mining machine → depleted uranium mining machine → large mining machine'. After adding K2SO, depleted uranium mining machines, electric mining machine MK2, and large mining machines all use electric mining machines as raw materials for upgrading. We might consider changing the formula to have the depleted uranium mining machine exist as an intermediate for electric mining machine MK2 and large mining machines, transforming into the form of 'thermal mining machine → electric mining machine → electric mining machine MK2 → depleted uranium mining machine → large mining machine'.