The article discusses various implementations of cross-chain technology, including chain abstraction protocols, cross-chain bridges, interoperability, and full-chain concepts. With the increasing number of public chains, the demand for cross-chain solutions has surged, leading to the emergence of technologies such as multichain and celer bridge. The article emphasizes the importance of abstract accounts, which allow users to manage all their assets across different chains with a single wallet. Chain interoperability enables the transfer of information between different chains, facilitating functionalities like full-chain lending and cross-chain governance. Chain abstraction eliminates the need for users to concern themselves with the specifics of underlying chains, simplifying operations. The article also introduces several important cross-chain projects, including LayerZero, Wormhole, Axelar, ZetaChain, Polyhedra, Particle Network, and dappOS, each employing different technologies to achieve cross-chain func