Using a revolutionary non-invasive technology called Quantum Muon Tomography, researchers have mapped a complex, multi-tiered network of hidden flood-control tunnels beneath the Forbidden City in Beijing. These Ming-era brick-lined conduits were designed to divert massive summer monsoon rains into the palace moats, preventing the foundation erosion of the ceremonial halls.
The 3D digital map reveals that the system utilized geothermal heat vents to prevent the water from freezing during winter months. This discovery offers vital insights for modern heritage engineers seeking to protect the massive wooden structures from the increasingly volatile precipitation patterns caused by climate change.