The box is divided into four fan-shaped sections, each invisibly hinged to another. When closed, the box is circular, opened, it looks like a screen. It can also be in the shape of two semicircles, or when turned inside out, square, with the various ornaments on full view.
盒分為四組，中間以暗軸相連，合起來時呈圓形，但開啟後可變化為幾種形式：可以兩兩合併，分為兩個半圓；也可以作四瓣狀，並排如屏風；或者將其反折成方形，成為立體的展覽櫃，四面都可觀賞。