On July 7, 2019, the proposal for the first on-chain parameter governance at IRIS Hub was voted on. In the 5 days, 71 nodes in the world reached 89.05% of the voting rights. Finally, 99.01% of Yes met the rules of parameter management on the chain. The proposal was formally passed, and the three parameters took effect immediately. IRISnet will also welcome more exciting and more critical software upgrades in the chain in the future. The software upgrade of the IRIS hub can be switched to the new version of the code at the agreed height and fully compatible with the historical version of the chain data. Support the smooth upgrade infrastructure of IRIS Hub blockchain software through the Upgrade module, launch and pass the software upgrade proposal UpgradeProposal.