Eighty-one Forms of the Natural Taijiquan( Health Care) Part I & II - Analysis of Yin-yang Structure of the Internal Energy in Taijiquan : ( 2 DVDs, Chinese/English subtitles, 105minutes) There are Eighty-one Forms in the Natural Taijiquan, including three chapters of Internal Energy, Practical Combat, and Health Care. Nine forms in one section, there are nine sections, total eighty-one forms. It practice the heart, spirit, mind and energy, form the upper to the below, the inner to the outer. It is art, an exercise art of relaxation and flexibility in the exchanging of Yin and Yang. The characteristic of the Natural Taijiquan is following the principle and the track of nature ways. The fist is light and agile, if focuses on the mind not the force. It moves in and arc during the exchanging of Yin and Yang. It moves as the water, which is the softest in the world. Practicing this set of boxing is natural and smooth as the floating clouds and flowing water, it is food for the health and it can drive away the disease and prolong the life.