Baguazhang is one of the three orthodox "internal" styles of Chinese martial art (the other two being Taijiquan and Xingyiquan). Translated, Bagua means "Eight Trigram". This refers more...to the eight basic principles described in the ancient metaphysical treatise the Yijing (I-Ching), or "Book of Changes". Bagua is meant to be the physical manifestation of these eight principles. "Zhang" means "palm" and designates Baguazhang as a style of martial art which emphasizes the use of the open hand over the closed fist. Baguazhang as a martial art is based on the theory of continuously changing in response to the situation at hand in order to overcome an opponent with skill rather than brute force.