Over 500GB of Great Firewall data leaked including source code, logs, and configs. Data from Geedge Networks tied to Firewall creator Fang Binxing. Reveals deep packet inspection, VPN blocking, SSL fingerprinting. Tiangou is commercial Great Firewall version for export. Deployed in Myanmar's 26 data centers handling 81 million TCP connections. Pakistan uses it in WMS 2.0 for real-time mobile surveillance. Systems log full HTTP sessions and dynamically block traffic. Originally ran on HP/Dell hardware, now fully Chinese post-sanctions. Leak enables researchers to find bypass weaknesses. China sells censorship tech to control other populations.