Six times heart an7d mind elbow is a classical skill of beat inside Wu dang, and was taught to Yue Wu by a proficient of this action, an anchoret of Wu dang,in 1990s. This component is divided into 3 parts: one line fist, heart and mind elbow, and natural beating. It is said that this component has been hide in the masses for three hundred years. The characteristic of it is to beat by elbow. The formula is surprising and useful. And this action is short and simple which can be practice in a small placeThis product is manufactured on demand using DVD-R recordable media. Amazon.com's standard return policy will apply.