CPChain platform is committed to building a basic data platform for the Internet of Things system, providing a solution for the whole process of data acquisition, storage, sharing and application. CPChain applies the block chain solution, proposes the idea of separating the data layer from the control layer, and constructs parallel architecture to enhance the scalability of the system. In addition to protecting user privacy, it provides open data sharing function and adopts distributed storage solution to encrypt user data and upload it to the cloud, reducing the storage burden of blockchain and ensuring the integrity and accuracy of data.