Gold is what you need for building construction, and an upgrade is the best way to increase the production rate.
The mission to conquer the world in Ark Rivals includes minting your gold to set up and upgrade buildings for both defense and economy for power. Create and grow UGC however you wish to defend your base against the attack of other enemies.
HYPER FUEL PUMP
A special device to pump up Hyper Fuel is used for tech research& boost your Ships/Commanders/Troops power. Keep upgrading your Hyper Fuel pump to increase the production rate.