A military maze beneath Bozhou
The name remembers Cao Cao; the surviving brickwork also carries the long afterlife of repair, flooding and rediscovery.
Cao Cao Troop Tunnel
A brick-vaulted underground route beneath Bozhou, associated with Cao Cao but shaped by later rebuilding and repair.
The underground passages beneath Bozhou’s old city are known as the Cao Cao troop tunnel. Hefei University of Technology’s architecture account describes a network centered on Dayu Shou and extending in several directions, while noting that much of the surviving brickwork belongs to later rebuilding. The name opens a historical question; the fabric records a longer sequence of use and repair.
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A brick-lined passage inside the Cao Cao underground transport tunnel in Qiaocheng District, Bozhou.Photographer not credited on the source page · Rights unknown; selected under the established official-source policy Photo source ↗ Rights information ↗ Original bytes retained without retouching, cropping, or enlargement in the private research archive; rights remain unknown.