Bitcoin's security and decentralization features are unquestionable, but its L1 layer faces infrastructural limitations in on-chain scalability. This is where cross-chain interoperability solutions come into play. By building optimized asset transfer channels, seamless asset flow can be achieved between Bitcoin L1 and other layers, thereby breaking through the capacity limits of a single chain. The improvement of this interoperability infrastructure is directly related to whether the Bitcoin ecosystem can support larger-scale applications and transaction volumes. In the future, more mature cross-chain mechanisms will become the key drivers for the practical implementation of Bitcoin.