本书介绍了中国网络安全分类保护系统（CCPS），涵盖了其发展，《中华人民共和国网络安全法》的解释，基本标准以及网络安全系统分类级别确定、注册、开发和改进等实践程序、评估、监督和检查。
本书分析了中国网络安全保护的实施和实践，并对现有的网络安全相关法律，法规和标准进行了解释。本书的目的是为了满足包括“一带一路”沿线企业在内的外国组织的培训和实施需求，以建立符合中国网络安全分类保护系统要求的网络安全保护。

Part Ⅰ Interpretation of Cybersecurity Classified ProtectionSystem of China
Chapter1 Development of China Cybersecurity Classified Protection System
1.1 Establishment of Computer Information Systems Security Protection System
1.2 Establishment of Information Security Classified Protection System
1.3 Establishment of Cybersecurity Classified Protection System
Chapter2 Interpretation of the Cybersecurity Law
2.1 Cybersecurity Obligations and Primary Tasks
2.2 Division of Responsibilities and Related Obligations
2.3 National Cybersecurity Classified Protection System
2.4 Basic Responsibilities and Obligations of Network Operators
2.5 Operation Security of Critical Information Infrastructure
2.6 Network Data and Information Security
2.7 Monitoring， Early Warning， and Emergency Response
2.8 Acts Prohibited and Legal Responsibility
Chapter3 Interpretation of Cybersecurity Classified Protection System of China
3.1 Policies on Cybersecurity Classified Protection
3.1.1 General Policy Documents
3.1.2 Policy Document of Classified Protection Specific Stages
3.2 Basic Concept of Cybersecurity Classified Protection
3.2.1 Legal Basis for Carrying Out Cybersecurity Classified Protection
3.2.2 Policy Basis for Carrying Out Cybersecurity Classified Protection
3.2.3 What is Cybersecurity Classified Protection
3.2.4 Division and Supervision of Security Protection Levels
3.2.5 Critical Information Infrastructure Protection
3.3 Main Contents of the Cybersecurity Classified Protection System
3.3.1 Organization Structure of Cybersecurity Classified Protection
3.3.2 Main Stages and Basic Requirements of Classified Protection
3.3.3 Security Management of Evaluation
3.3.4 Network Products and Security Service Requirements
3.3.5 Monitoring， Early Warning and Information Reporting
3.3.6 Data Security Protection
3.3.7 Emergency Disposal Requirements
3.3.8 Evaluation Requirements
3.3.9 Risk Control of New Technology and New Application
3.3.10 Supervision and Administration of Cybersecurity Classified Protection Practices
Chapter4 Interpretation of Cybersecurity Classified Protection Standards of China
4.1 Cybersecurity Classified Protection Standards Framework
4.2 Relationship between Relevant Standards and Different Stages of Classified Protection
4.2.1 Basic Standards
4.2.2 Classification
4.2.3 Security Requirements
4.2.4 Methodology and Guidance
4.2.5 Status Analysis
4.3 Issues Need Attentions for the Application of Relevant Standards
4.4 Brief Description of Main Standards on Cybersecurity Classified Protection
4.4.1 Classified Criteria for Security Protection of Computer Information System (GB17859-1999)
4.4.2 Implementation Guide for Classified Protection of Cybersecurity (GB/T 25058-2019)
4.4.3 Testing and Evaluation Process Guide for Classified Protection of Cybersecurity (GB/T28449-2018)
Part Ⅱ Implementation of Cybersecurity Classified Protection Systemof China
Chapter5 Classification of Cybersecurity Classified Protection
5.1 Classification of Security Protection Levels
5.1.1 Principle of Classification
5.1.2 Security Protection Levels of Network
5.1.3 Classification Factors of Cybersecurity Protection Level
5.1.4 Protection and Supervision of the Five Levels
5.2 Procedures of Classification
5.2.1 Determine the Classification Object
5.2.2 Determine the Security Protection Level of Network
5.2.3 Expert Reviews of Cybersecurity Protection Level
5.2.4 Examination of Cybersecurity Protection Level
5.2.5 Public Security Authorities Examine the Security Protection Level of Network
5.3 How to Determine the Security Protection Level of Netwo