There are more than 100 million people who practice Tai chi Chuan all over the world. Most of the practitioners are Chinese who tend to believe that Chang Sanfeng has something to with Tai Chi Chuan. The author of this article has taught Tai Chi Chuan for more than twenty years. He however argues that there are no reasons to take this taken-for-granted assumption as true. He enhances his argument by referring to historical documents as well as field studies on Tai Chi Chuan, and furthermore analyzing these documents in detail.