XX-Net is a desktop application for circumventing internet censorship, primarily targeting the Great Firewall of China. It operates as a multi-protocol proxy client that supports Google App Engine (GAE) fronting, custom X-Tunnel, Cloudflare, CloudFront, and direct connections. The system consists of a launcher with a web-based control panel, a smart router for DNS and traffic routing, and multiple frontend modules that implement various obfuscation and tunneling techniques. The codebase is a large, monolithic Python 2/3 project with heavy use of vendored libraries (tlslite, hyper, ecdsa, asn1crypto, dnslib) for custom TLS, HTTP/2, and cryptographic operations. It is not a data research project; it is a pure application focused on network proxy functionality.