$KEY KeyChain leverages a hybrid DEX engine (AMM + order book + AI slippage optimization), quantum-safe wallets (MPC + SPHINCS++ hardware SE), and chain abstract accounts (unified management of 30+ chain assets) to ultimately create a user asset autonomous, censorship-resistant, cross-chain seamless Web3 entry point, with forward-looking post-quantum security. The KeyChain applications together form the "golden triangle" of Web3.0 infrastructure—trusted computing layer (bridging the physical world), value exchange layer (DEX/credit protocols), and asset digitization layer (RWA/ownership certificates). The technological breakthrough lies in the collaborative evolution of scalability and modular blockchain. KeyChain unlocks the key to blockchain and the future world for everyone, while the KEY public chain builds a permissionless blockchain suitable for applications for institutions and developers, making wallets and financial tools more accessible without compromising the core principle of decentralization. The KEY chain will construct a self-evolving, infinitely scalable blockchain foundation layer that seamlessly connects the real and digital worlds, becoming the core engine for humanity's march towards a trustworthy digital society. By combining cutting-edge academic achievements (such as quantum safety and federated learning) with extreme engineering design, the KEY chain redefines the boundaries of public chain possibilities.