According to the Securities Times, after the five consecutive years, the Shanghai index fell into adjustment. Recently, the hot-selling digital currency, domestic software, chips, blockchain, 5G concept, ETC concept, Huawei concept and other subject matter index fell more than 2%. The digital currency index fell by 5.89%, the biggest drop in the subject area. The digital currency concept stock Keda shares fell after the four daily limit, the company said in the stock price abnormal fluctuation announcement, conducted preliminary research and exploration in the blockchain field, but the research and exploration is still in the early stage, so far It is profitable and it is not expected to achieve profit in the short term. In addition, there are also Netac Technology, Hailian Jinhui, digital certification, Golden Crown shares, Huijin shares have also fallen.