> For the complete documentation index, see [llms.txt](https://docs.emc.network/emc-testnet/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.emc.network/emc-testnet/emc-testnet/cross-chain-bridge.md).

# Cross-chain bridge

EMC Cross-chain Bridge is a technology that allows asset and data transfer between different blockchain networks. The following are the current detailed operating rules and principles of cross-chain bridges, which are applicable to cross-chain solutions for GAS tokens (EMC) and ERC20 tokens (such as USDT, ETH, etc.).