1. why blockchain is introduced to solve the problem?
The nature of block chain is the distributed decentralized database. The subject of data ecosystem is data. The HASH on-chain and data can match each other totally and tampering will not happen. These features make data on-chain have unique advantages that other products do not have. Besides, introduction of block chain updates the traditional centralization to the decentralization mode. It has an overwhelming meaning in the circulation and application process of data.