Zhang Yan, whose real name is Zhang Bing (his name is yueluodadi on the Tianya Forum). Born in Huaiyang, Henan in 1981, majoring in public relations and secretarial work. He is currently the CEO of Beijing Yulinling Cultural Communication Company. He won the third New Concept Composition Award and published articles in newspapers such as "Youth Literature" and "Prose Poetry". A best-selling author of social science books, he is dedicated to the study of interpersonal relationships and sales psychology. Published books include "Circle of Networks", "First Make Friends, Then Do Business", "Learn a Little Bit of Human Sophistication Every Day", "Psychological Tricks in Sales", "Game Theory Tricks in Sales", "How to Speak So Customers Will Listen" , how to listen to customers before they are willing to speak", "I am not teaching you to play tricks - Guiguzi's psychological tricks", "The age of 3 determines the child's life", "Before the age of 13, the psychology that mothers must know", Classic books such as "99 Life Experiences You Must Know After the Age of 18", "Win at the Middle Level - Execution Rules for Leading Teams at the Middle Level", "Follow the Right People, Do the Right Things". His works mainly provide people in their 20s and 30s with realistic survival skills and self-development life experiences. The language is vivid and hot, arousing readers' screams.