```
...
Returned to his residence.
Wu Heng sat in the living room and chatted with Mini for a while, and when he felt rested enough, he went upstairs.
He opened the boundary door and headed to Zombie World.
He added the small amount of materials he had purchased to the production chain machines.
Several people stood by silently waiting.
Soon, the machines began to operate, starting up the entire process.
Copper coins were cut into coin-sized discs, which were then pressed by the machine into hollow casings.
Next came fixing the base, filling with gunpowder, and securing the bullet head.
Wu Heng, having seen the blueprints, understood the general workflow.
Qi Hancai and the others were seeing the production of bullets for the first time and were full of curiosity.
But once the entire process was completed and the whole bullets were made, it seemed that they weren't that difficult to manufacture after all.
"These materials might not last us very long," Qi Hancai said.