On October 28, 2019, the first working day after the blockchain welcomed the policy winds, there were more than 100 blockchain concept stocks on the A-share market. On the interactive platform of the Shenzhen Stock Exchange, the interactive Q & A on the blockchain was as high as More than 1,000, far more than the total of the first half of this year. According to the statistics of Oriental Fortune Choice, as of December 6, October 28, of the 100 stocks, only Donghua Software (002065.SZ), Xinhu Zhongbao (600208.SH) and other 14 companies can keep the stock price (high (Closing price on the 28th), the stock price of more than 90% of the concept stocks dived, with a maximum drop of more than 40%. In this regard, many industry experts said that among blockchain concept stocks, there are not many companies that are actually engaged in blockchain-related businesses, and more are only at the conceptual level. There is still a long way to go for large-scale commercial use of blockchain technology, and the related business performance of listed companies is not obvious. The recent fluctuations in stock prices also reflect that investors are becoming more rational and paying more attention to value investments.