After reading the Privium mentioned by @ zksync, to be honest, the feeling it gives me is not just another new concept, but rather a rare infrastructure designed from an institutional perspective. Simply put, Privium allows banks, funds, and large corporations to operate a fully private, permissioned ZK blockchain in their own controlled environment. All transactions, accounts, and business data do not need to be made public, but through zero knowledge proof, the state is securely anchored to Ethereum, inheriting Ethereum's finality and security without exposing any sensitive information. This is crucial. In reality, institutions do not directly throw real capital flows and customer data onto a completely transparent public chain, while traditional private chains have long been information silos. Privium has just filled this gap: maintaining privacy and compliance internally, and connectivity and liquidity externally. It has a built-in compliance and permission system, with regulatory agencies only seeing authorized content and operators having complete control. It can also seamlessly integrate with Ethereum and other zkSync chains. Performance, cost, and scalability are all designed for practical business purposes, not for conceptual display. In my opinion, this is more like laying the groundwork for institutions to enter after 2026. If you are concerned about how banks and businesses can truly use blockchain, then Privium and zkSync are worth studying seriously.