This book is intended to guide the beginner and expert through the many kinds of cash - the square-holed coin of China for centuries - produced in China and the many imitations of them produced at various times all over the Far East and along the Silk Road. The first part of the book is a Finding Guide which directs the reader to the appropriate standard work on Chinese, Vietnamese, Japanese or Korean coins. In the second half, information not in the standard works is presented, either from other publications and papers, or from the author's own research.