Upgraded Chain, based on blockchain technology, builds a membership ecosystem to create a decentralized commercial environment. It aggregates users through various social formats and uses a decentralized ledger to record user data and transaction information. A distributed database stores the content posted by users. An open platform is provided for developers to facilitate the creation of blockchain applications or to integrate existing ones, offering comprehensive application services to users. Digital assets are introduced into the social network structure to form a social network economy, ensuring that all participants within the social ecosystem can receive rewarding returns.