[Network security concept fluctuated and pushed up, and massive data hit the daily limit] On September 18, the concept of network security fluctuated and rose in early trading, and massive data hit the daily limit. Haohan Depth and Yongxin Zhicheng rose by more than 14%, and Gaoling Information, Sino-Singapore, NSFOCUS Technology, and Sangfor rose by more than 5%. On the news, three network security standard practice guidelines including the "Technical Guidelines for Block Erasure of Semiconductor Storage Media", "Guidelines for the Management of Information Clearance in the Recycling Process of Electronic Products" and "Technical Guidelines for Information Clearance of Mobile Intelligent Terminals" were officially released to the public.