Abstract: In order to complete the moment of inertia and product of inertia properties of the plot remaining fixed for any of the center of the coordinate origin of the coordinate system axis,the compensation method is used to prove uniform rigid sheet showing the shape of a half Tai Chi diagram. The special nature of the graphics area semi- Tai Chi movement of charged particles in a uniform magnetic field is discussed. The latter shows the Tai Chi diagram inherent physical beauty.

Key words: Tai Chi diagram, moment of inertia, product of inertia, uniform magnetic field