**About the Author** Yuan Hongzhang is a well-known anthropologist with deep research across multiple fields. His major works include *Fast Chinese*, *Human Psychology*, *Human Thinking*, *Human Economics*, *Human Linguistics*, and *The Human Republic Manifesto*. From a professional perspective, he systematically breaks down the core laws of human psychology, thinking, language, and economics—resolving long-standing cognitive puzzles across multiple disciplines. More courses in this series will be released soon. Stay tuned!