In an interview, Zhai Xinlei, head of JD.com's blockchain, said that blockchain is a technology that connects data, not a technology that owns or acquires data. It can be called a "connector" between different subjects of the industrial Internet. . Data technology is divided into connection side and decision side.Blockchain is the ability to connect data. The Internet of Things is a means of collecting data. On the data decision side, cloud computing and artificial intelligence play a role. It's data. At present, the blockchain technology is in the initial stage of industrial innovation and integration. In the application of the blockchain, it is necessary to consider the combination with other intelligent technologies. "Blockchain is not a panacea". It cannot be separated or used alone.