According to Caihua.com, on October 21, the blockchain sector recovered again. As of press time, Chenxin Technology (002447-CN), Storm Group (300431-CN) and Cultural Great Wall (300089-CN) closed the limit; Xinchen Technology (300542-CN) rose nearly 6%, Xuanya International (300612-CN), Julong shares (300202-CN) rose more than 4%, accurate information (300099-CN), three five interconnection (300051-CN ) rose more than 3%. The National Network Office recently released the second batch of 309 domestic blockchain information service names and filing numbers. The blockchain information service providers should indicate their filing numbers in prominent locations such as Internet sites and applications that provide services to them. According to the list, ICBC, Du Xiaoman Technology, Aerospace Information, Aiqiyi, China Xiong'an Group Digital City Technology Co., Ltd., Oriental Fortune, Alibaba Cloud, Hang Seng Electronics and other companies have been selected.