Huang Tang closed the World Channel and opened the system panel to check the requirements for the next upgrade.
[Current Building: 25 Floors]
[Next Upgrade: 32 Floors]
[Required Materials: 32-floor building blueprints ×1, Level 1 Electrical Energy Core ×2, Steel ×12000, Concrete ×18000, Bricks ×15000, Glass ×5000, Wood ×5000]