FANS is a sidechain DAPP project based on the Asch public chain; FANS focuses on building the infrastructure of the global entertainment industry and fan economy, including: popular IP information registration system, personal IP incubation system, copyright registration system, etc. FANS uses the Proof of Opinion to form a certificate and rewards community members who contribute to the FANS community's ecology, and allows community members to redeem stars for customized services, commodities, etc. in the ecology. At the same time, it has precipitated a credible star commercial value measurement system to promote the more benign development of the entertainment industry.