The Fireworks Factory is a large industrial building located in Gongmen City. It was once a family business run by the Peacocks for the manufacturing of fireworks (which they had invented) to be used in city festivals and celebrations. But after Shen came into power in Kung Fu Panda 2, he took over the family business and turned the factory into a foundry for his cannons, using the powder from the fireworks as firepower for the cannonballs.