The first step is to build equipment in the production (shortcut key K) interface, which is divided into casting soldiers, forging armor and craftsmen.

The second step is to choose the type of equipment you want to manufacture. After learning the formula, you can build the corresponding equipment according to the materials in the formula.

In the third step, the blue formula has a corresponding formula NPC for sale in Xiqiao City, and the purple formula is likely to fall in the copy.