The Tai Chi Opening Form is different for different styles of Tai Chi, but regardless of the style, each Opening Form shares some basic principles. Yin (emptiness) and Yang (fullness) govern the percentage of your weight that you place on each foot when performing any form. When you perform the Opening Tai Chi form, you first transfer all of your weight to one foot, usually your right. The fullness of weight on the right foot represents the Yang principle. The lack of any weight on your left foot represents the Yin principle of emptiness. The weight must be entirely on the right foot before you can step to the side with your left foot. Once you have stepped to the side, you transfer fifty percent of your weight to your left foot. Now Yin and Yang are in balance. Keeping these principles in mind not only helps you to perform the opening form correctly; it also helps you understand the principles of good balance.