Can China's policies promote economic growth and environmental protection at the same time? I examine the economy vs. environment dichotomy in Chinese policy-making through the lens of the national carbon market, a market-based policy mechanism that aims to put a price on carbon in China and could soon be the largest carbon market in the world. First, I explore the relationship between post-industrial economic transition and the national carbon market in China. Sustained economic reform still underpins China’s efforts to transition from middle-income to high-income status, and the trajectory of changing economic structure will interact with the carbon market's efforts to decarbonize the economy over time. I simulate the interaction of these two policies in a CGE model to understand their combined effects on economic growth and carbon dioxide emissions. Second, recognizing the shortcomings of computational models, I draw from my fieldwork experiences in China to explore recent delays in the carbon market's implementation. I discuss the conceptual and operational challenges in translating the global concept of a carbon market into the Chinese context, as well as the tremendous opportunities that have arisen in emissions accounting and capacity building. I explore the role of expertise in the policy-making process, and show how China's national carbon market has generated a highly productive policy market even though it has yet to deliver its policy goals.