This location falls within the vast network informally known as the Underground Great Wall of China (地下长城), a strategic system of tunnels used by the People's Republic of China for the storage and transport of intercontinental ballistic missiles (ICBMs). The approximately 5,000 km (3,000 mile) network is a cornerstone of China's nuclear deterrence strategy, designed to protect its missile arsenal from potential attack.
The specific coordinates in remote Gansu Province, near the historic Jiayuguan pass, place it within a region of significant military infrastructure. The system includes deeply buried, hardened tunnels and associated support facilities, integrating with China's broader strategic missile forces. Current public information does not detail the exact specifications of individual tunnel segments at this coordinate, but the site's primary function is confirmed as part of the national ICBM basing and logistics system.
The complex represents a major Cold War-era and modern military engineering project, though its full extent and current operational status remain state secrets.