Just like relationships between people, relationships between countries can all too easily be built on a foundation of unintentional misunderstandings, faulty assumptions and predigested truths. In her forthcoming, at times provocative and disquieting book, “The New China Playbook,” Keyu Jin, a professor at the London School of Economics and a board member at Credit Suisse, is trying to rework the foundation of what she sees as the West’s deeply flawed understanding of China’s economy, its economic ambitions and its attitude toward global competition.