MERMAID is an encrypted social meta-universe based on blockchain technology, which provides users with a more secure, open, and free social environment. It uses decentralized technology to make information transmission more private and give users a more immersive social experience. The name of MERMAID's ecological token is UMBC, and there are a large number of applications in scenarios such as DAPP stores in the MERMAID ecosystem, centralization of transactions, and MERMAID merchant payment.