fq-book

fq-book is an online Chinese-language book and documentation project focused on VPNs, proxies, tunnels, and related internet access technologies. Rather than being a single executable program, it is structured as an educational repository that explains concepts, tools, configuration approaches, and network behavior. The material discusses how proxy and VPN systems work, while also covering technical topics such as IP blocking, port blocking, DNS-related issues, certificate problems, and connection interruption behavior. It uses Docsify for online presentation and can be deployed through GitHub Pages or viewed locally. The repository is intended as a reference guide for learning and research, with practical sections alongside conceptual explanations. Its value comes from combining tool-oriented guidance with broader explanations of how network access restrictions and proxy systems operate.