After impressive growth of about 10% per annum for three decades, China's visible signs of economic slowdown since 2008 have been subject to much contention. What causes the deceleration? What should we expect in an era of China's 6% growth? This book answers these questions in three parts. Although it is widely accepted that China can hardly continue its high-speed growth model, estimations for its future growth potential differ greatly. The first part of this book predicts China's growth to 2050, which considers both cross-country historical experiences and China's own demographic structure and employment participation features. In the second part, the book offers a comprehensive estimation of China's national and provincial total factor productivity (TFP) over the period of 1978 to 2014 based on comparable data. It then analyzes the causes of China's economic slowdown from a productivity point of view. Finally, this book correspondingly outlines policy recommendations, including supply-side structural reform and macroeconomic policy frameworks, to effectively address the issue of decline in both labor and labor productivity growth. This book will attract scholars and students of economics and China's economic studies.