The Grey Cloud Protocol is a new financial solution for blockchain based on underlying cross-chain technology. It is a blockchain value network that primarily serves the financial industry, empowering sectors such as trusts, banking, insurance, securities, and leasing. By combining DPoS consensus mechanisms with Byzantine Fault Tolerance (BFT) security consensus, it ensures not only the rapid circulation and transmission of information and transactions on the main chain but also safeguards the entire network from malicious attacks through the isolation of Centers (hubs) and Areas (zones). This approach delivers a system that is secure, high-performing, and consistent.