Layer stage is a kind of active stage form which relies on the change of leia frame and is favored by large-scale activities. Rhea type stage movable frame is the "Rhea frame" structure of the rhea type stage is mainly divided into five parts: table frame, tray, horizontal bar, vertical bar and adjusting foot.

When building, the bar is fixedly connected with the wheel on the column through the head of the bar and the pin piece, and the wheel is loaded on the top of the pole, and the platform frame is placed on the wheel.