Underground Great Wall

The Underground Great Wall is an extensive tunnel network beneath Yongqing County designed as military infrastructure. The system connects various underground installations through concealed passages that allow movement of strategic resources below the earth's surface.

The tunnel network emerged as a modern extension of China's defensive infrastructure, created from the need to protect strategic assets from surface attacks. Its development demonstrates how traditional defensive concepts adapted to 20th century technological demands.

This subterranean structure reflects China's approach to national defense through engineering, showing how protective concepts evolved into modern practice. The system embodies the idea of safeguarding critical national assets beneath the earth's surface.

Access to the site is restricted and controlled by authorities as it is a protected military area. Visitors should note that entry and tours are subject to specific conditions and require prior authorization.

The network was developed over decades and continues to expand, with new tunnels and connections regularly added. This ongoing expansion makes it one of the largest underground infrastructure projects ever undertaken.