Primas is an open content release, recommendation and trading ecosphere. Primas is committed to using the block chain and other technical means to change the existing content market structure, to solve the high-quality content is difficult to identify, spread and realize the problem. Through the center of the content traceability and screening mechanism, so that users access to high-quality content. The new content value evaluation system ensures that producers of premium content receive direct benefits. Through the block chain can not be tampered with the original to provide copyright protection. To the center of the data management will also better protect the user’s privacy.