The Cardano blockchain is about to undergo its largest upgrade in two years, the "Chang hard fork", whose main function is the introduction of an on-chain governance mechanism. Users holding ADAs will be able to elect representatives (dReps) and vote on improvement proposals and future technical changes. The upgrade was originally scheduled for this week, but has been postponed to September 1 due to the time some exchanges need to prepare the system. The Chang hard fork is part of the "Voltaire era" of Cardano, which aims to implement a blockchain self-sustaining system managed by the community. The upgrade also includes the core improvement proposal CIP-1694, which will strengthen the community's control over the network through governance structures such as the Constitutional Council, dReps, and pledge pool operators.