Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent book, the standard

This book, the original written by Zheng Manqing (Cheng Man-Ch'ing), covers taijiquan (t'ai chi ch'uan), Chinese medicine, physics, philosophy, sensing hands (push hands), and practical self defense applications.Professor Zheng walks the reader through the 37 posture form from a self defense viewpoint, where people are attacking you from various directions using various techniques, and the postures, or slightly modified postures, in the form are the responses.It is a great mixing of wu (martial) and wen (literature) - highly recommended!