First, Taiji principles and fundamentals are pretty much the same for all styles with our style emphasizing certain elements.  “Hunyuan” refers to an emphasis on spiraling and circular movements in the body and limbs.  “Xinyi” refers to a soft-style Chinese martial art, also practiced by the style’s founder Feng Zhiqiang, that influences aspects of Hunyuan Taijiquan.   Also, Qigong is emphasized in all movements and practices and gives priority to internal aspects.  This emphasis enables practitioners to quickly feel and develop the flow of Qi within their bodies.