According to the Polkadot Chinese community PolkaWorld, Polkadot 2.0 may not be launched in stages, but will be launched on a large scale at once. In Polkadot 2.0, the underlying consensus mechanism will be fixed, which means that there will no longer be a fork-free approach in the future. Make an upgrade. Additionally, in Polkadot 2.0, a new paradigm will be introduced, namely the Jam chain. This Jam chain will become the foundation for Polkadot, used by blockchains like Polkadot to provide multi-core computing and support for hundreds of chains and even more: smart contracts, ZK-rollups, and more.