The third session of the lecture series "Lecture Halls on Intra-Party Regulations and State Laws That Should be Known by All", organized by the Joint Party Committee of CASS Institute of Law and CASS Institute of International Law, was held on May 20, 2025. At this session, Dr. Zhou Hui, an associate research fellow at CASS Institute of Law, gave a lecture on "Data Security Rule of Law". In the lecture, Dr. Zhou, on the basis of the Data Security Law and Regulations on Network Data Security, explained the main systems of the Data Security Law and the data security management system from the perspectives of the relationship between data security and personal information protection, the data regulation system, responsibilities of regulatory agencies, general obligations of data processors, and classified data protection system. The lecture was attended by more than 110 researchers and staff members of CASS Institute of Law and CASS Institute of International Law.