On January 9, Hurun Research Institute released "2019 Hurun Top 500 Private Enterprises". It is mentioned in the report that there are two representative companies producing mining machines in China's blockchain industry, namely Jianan Yunzhi and Bitmain. After being listed in the United States in November last year, Jianan Yunzhi's market value has shrunk and has not reached the threshold of the list. Bitmain has not yet succeeded in listing, and it is estimated that it has shrunk compared with the previous one. Its current valuation is 30 billion.