Available public information about Cheng Hai is currently limited, and the representative work associated with this author is Jingxin (roughly, "Attending to the Heart/Mind"). Judging from the library's cataloging, this work falls under applied psychology, suggesting that the author focuses on the practical application of psychological principles in daily life rather than on purely theoretical discussion. Writing of this kind generally requires translating specialized concepts into methods that ordinary readers can understand and put into practice, so the language tends to be plain and clear, with an emphasis on readability and usefulness. The title Jingxin also implies a connection to psychological adjustment, inner states, or self-awareness, and the book may address common topics such as emotional management, shifts in mindset, or interpersonal relationships. Because Cheng Hai's nationality, dates of birth and death, educational background, and writing career are not clearly recorded, it is difficult at present to sketch a complete biography or to judge the author's consistent style and intellectual lineage. On the basis of the available information, Cheng Hai is an author who approaches writing through applied psychology, and this work offers readers an entry point for understanding their own psychological states, giving it a certain reference value in related reading.
