On July 9, Sogou CEO Wang Xiaochuan made a speech on the topic of blockchain at the 2019 China Internet Conference. He pointed out that the currency circle, the chain circle, the group of three o'clock, etc. all love to discuss how to make money and make money in the middle of the night, and some blockchain startups have actually gone wrong. Wang Xiaochuan also pointed out that there are three unsolvable problems in the blockchain: First, for the decentralized blockchain, users can't put it on the chain, and they can't use their own account password to authenticate the chain. The assets on the second; the second is that the assets can not be put on the chain; third, once the blockchain consensus agreement is established, it is difficult to modify. Wang Xiaochuan also pointed out that the blockchain is a three-dimensional integration of business, politics, and technology. It cannot be viewed only locally, not completely decentralized, but by the alliance of enterprises or countries.