Diyu / Five-Level Skeleton
Diyu Overview.
Here Diyu stands as its own section alongside Heaven: underworld systems, institutions, offices, matching figures and underworld places are modeled separately. The Heaven section keeps only the 'underworld-salvation interface'; the full Diyu system unfolds here.
Source Layers
The ancient-myth, Daoist-pantheon, Buddhist-underworld, vernacular-novel, folk-belief and modern-compilation layers are each marked, never merged into a single canon.

Diyu path
Click from underworld system down to figures and places.
Clicking any column refreshes the next. The offices column only filters figures and does not navigate; only the figures and places columns open article pages. The detail card shows source layer, related places and the link to the Heaven section.
Underworld systems
Underworld institutions
Underworld offices
Matching figures
Related places
Recommended entries
Start with these Diyu paths.
Ten-Courts judgement system
The Ten Courts, Yanluo, the judges, the Mirror of Retribution and the soul-judgement process.
Reincarnation system
Naihe Bridge, Meng Po's Pavilion, the River of Forgetfulness, the Six Paths of rebirth and reincarnation assignment.
Soul-summoning & escort system
Black and White Wuchang, Ox-Head and Horse-Face, the ghost-runners, the Ghost Gate and the Road of the Yellow Springs.
Deliverance & salvation system
Taiyi the Savior, Donghua of the East, Ksitigarbha's salvation, the Yellow-Register Rite and the Water-and-Land Rite.