孙家开合太极拳，也叫活步太极。它合《易经》《洗髓》两经之义，用周子的太极图之形，取河图洛书之理，道从老子的顺其自然、孔子的中庸之道，融合形意、八卦拳、太极拳三家之精髓创立的，具有独特的风格魅力。

The Open and close Taiji boxing of Sun is also call Free step Taiji. It combines two elements of <Xi Sui>, uses the shape of Zhou’s Taiji map, follow the rules of the Lok book of He Tu, along with the nature of Lao zi and the golden mean of Kong zi. It mix the essence of shape, Eight elements boxing, Taiji boxing that is a really special martial art.