8-inch square Qifeng cake, cut according to the picture.
On the right, an incision is made to the end, and an incision is measured in advance according to the drawing.
The transmitter measures the position and then cuts off a piece of cake.
The pieces are superimposed on it.
The red grid area is where the emitter is placed. Dig a concave part to keep the upper part of the root parallel after the emitter is placed, so that the sticky rice paper will not be uneven.