The emblem of Falun Dafa is called the "Falun," a Chinese term that translates loosely as "Wheel of Law." It is composed of two primary elements: yin-yang symbols, which are Taoist in nature, and srivatsa, which are Buddhist. The srivatsa, or swastika as it is known in English, is commonly seen in Asian Buddhism.
In Asian culture, the negative connotations of the swastika attributed to Hitler and the Nazis are relatively unknown. In fact, the swastika has a long history in many cultures as a symbol of good fortune.
The swastika as presented in the Falun is the symbol of the Buddha. Read more about the swastika and its true meaning here.