The Illustration of the Practice Truth is related to the cultivation of the Taoist Inner Dan through the Chou-Tien circulation in the practice of Chi-Kung. The function of the book is to transform essence to Chi by connecting first the Jen-Mai and Tu-Mai of the Minor Chou-Tien, and then the Odd Paths and the Eight Meridians of the Major Chou-Tien. Since Tai-Chi Chuan as a martial art can also be regarded as a section of Chi-Kung, this paper attempts to map The Illustration of the Practice Truth onto the body of the Tai-Chi Chuan practitioner, making the latter as the corporeal moving version of the former. Enacted through the continuous bodily movement of opening, closing, curving and straightening that initiates the circulation of Chi-Mai over the bodyscape, The Illustration of the Practice Truth can thus help the Tai-Chi Chuan practitioner to reach the final achievement of truth.