Reporting on China is challenging. The country’s leaders seldom give interviews to Western media and when they do they tend to stick to prepared official lines. To understand China, journalists rely on well-connected academics who know the workings and worldview of the Communist Party. The Economist’s Geopolitics editor, David Rennie, speaks to one of China’s shrewdest experts on America, Da Wei. He is a professor and director of the Centre for International Security and Strategy at Tsinghua