Not a liar! He can't write such a simple, concise and incisive book that reveals the dark truth. Someone must have helped him finish it, and even a powerful force is helping him. Currency war is written for ordinary people, to wake up those who are sleeping. Although Professor Lang doesn't care about his own remarks, he only knows the professional angle and ignores the political significance. The content in the book is selective, aiming at grasping the key points and avoiding sensitive points. People who call him a liar are either used to being fooled, or are often fooled, and even suspected of being traitors. A person's ability is limited, but he can express straightforwardness that an organization can't.