Darwinia Crab Network (Crab for short) is a Canarian network with a real economy for Darwinia, Crab's positioning is similar to Polkadot's Kusama Network. Expect Chaos is a reasonable expectation. Crab primarily provides a simulation environment for updating and deploying Darwinia applications, it performs various radical experiments. Crab includes not only the complete software operating environment and network environment, but also the business environment. Crab is the first cross-chain NFT blockchain in the Polkadot ecology, providing smart contract solutions, compatible with the Ethereum virtual machine, and supporting Dapps such as Defi and NFT to easily migrate to Polkadot. Based on the innovative bridging technology of the Darwinia network, it also provides an entry into the Polkadot ecology for projects that have been implemented on public blockchains such as Ethereum and BSC. Crab also offers users a very low transaction fee. The new continent of the Darwinia ecosystem, the cross-chain game Evolution Land, was released on Crab, it will soon launch the new NFT + Defi GameFi system. Crab is a valuable long-term network. Some RINGs are assigned to Crab Network as support resources to act as a canary network with real economic incentives and massive game theory testing, not just for running a testnet. Crab has the same parameters as Darwinia Mainnet and uses the same staking mechanism and inflation model. Crab tokens are CRING and CKTON, the initial supply of CRING is 200 million and the supply of CKTON is 0.