Description: 1. The name of the product design: Tai Chi sword pen. 2. The use of product design: Designed for the to use to write. 3. The design features product design: in its shape. The best show of the design elements of a picture or photo design: the main view. 5. The omission of the view: left, right, rear view and front view are symmetrical, omitting left, right, rear view.