Currently, public information about Zhang Zuogong is limited; his biography, nationality, and dates of birth and death are not clearly recorded. According to the library's holdings, only one work by him is available to readers: The Three-Step Method of Entrepreneurship. The book is categorized as inspirational growth, suggesting that his writing addresses ordinary readers who intend to start a business or are in a stage of career development. Its content centers on the steps and methods of the entrepreneurial process and has a practical, guiding character. Because the author has left little verifiable information, it is impossible to confirm whether he has other writings or relevant professional experience, and difficult to judge the full range of his writing style. As far as the existing work is concerned, readers may regard it as a book offering entrepreneurial ideas and an action framework, suitable as a reference for beginners. Understanding of the author himself still awaits further material.