SML issues an NFT based on Klaytn-based KIP-17 as a standard. However, SML, a governance token used in public chains, is an Ethereum-based token. A bridge chain is used to freely move assets between these two chains. SML supports multiple mainnet platform networks for the expansion of the NFT ecosystem and blockchain compatibility, and aims to apply Atomic Cross-chain Trading, which enables free network transfer of assets. In addition, technologies such as NFT, AR, VR and SDK, and IPFS, a protocol for storing data in a distributed file system and sharing over the Internet, will be applied.