# Interoperability Layer

- [About](/uniport-doc/interoperability-layer/about.md)
- [Dual Token System](/uniport-doc/interoperability-layer/dual-token-system.md)
- [UP](/uniport-doc/interoperability-layer/dual-token-system/up.md)
- [UBTC](/uniport-doc/interoperability-layer/dual-token-system/ubtc.md)
- [Governance](/uniport-doc/interoperability-layer/governance.md)
- [voUP](/uniport-doc/interoperability-layer/governance/voup.md)
- [Submit a proposal](/uniport-doc/interoperability-layer/governance/submit-a-proposal.md)
- [Technical Implemenation](/uniport-doc/interoperability-layer/technical-implemenation.md)
- [Overview](/uniport-doc/interoperability-layer/technical-implemenation/overview.md)
- [Bitcoin Cross-Chain](/uniport-doc/interoperability-layer/technical-implemenation/bitcoin-cross-chain.md)
- [Smart Contract Chain Cross-Chain](/uniport-doc/interoperability-layer/technical-implemenation/smart-contract-chain-cross-chain.md)