A bronze drum’s form relates its upper striking surface to the body below. The profile widens and narrows, the top projects by varying degrees, and ornament divides some surfaces while others remain comparatively smooth. These features make it possible to compare objects before turning to interpretations of their decoration.
The Guangxi Museum of Nationalities in Nanning provides an important collection-based starting point. Its online catalogue names drums through varied features, including cloud-and-thunder ornament, birds, mounted figures and a later inscription.

