Largest bioherm in area.
30.4 m thick, 120 m long.
Enclosed in shales. 
Reef base: packstones and grainstones.
Reef core: Bafflestones.
Corals > stromatopores
baffler > binder
Similar reefs close-by are Qunilingdiwan (Collection 23252) and Shijiaoshan (Coll. 23253)