The following account was recorded in the agent's log during your transmission: Umm, a sprawling, industrial-scale, Soviet-era-era biolab somehow fills the interior of a hollowed-out, kilometer-long section of the Great Wall of China, its watchtowers and battlements still intact above the lab's reinforced metal roof. The air inside is stale, with a faint smell of disinfectant and formaldehyde, and a thin layer of frost coats the lab's equipment, despite the warm sunlight filtering through grimy skylights. A flock of white lab rats somehow moves through a vacuum-sealed, glass-enclosed maze suspended from the lab's ceiling, while a lone, operational Tesla coil hums softly in the distance.