In September 2020, China announced its ambitious goal of "Carbon Peaking and Neutrality" within 40 years at the 75th United Nations General Assembly, known as the "Dual Carbon" targets. This declaration marks a significant step in China's commitment to addressing global climate change and fostering an all�encompassing green transformation of its economy and society. Against this backdrop, the circular economy (CE) has been identified as a pivotal strategy for realizing these carbon goals. The circular economy aims to promote a comprehensive cycle of production, consumption, and social development to achieve both environmental protection and economic growth. Since the initiation of China's Circular Economy Demonstration City policy in 2013, 101 regions (including 62 cities) have joined the initiative. The research will address questions about the impact of the Circular Economy Demonstration City policy on carbon emissions across China and how do CE practices aid in achieving the 'Dual Carbon' targets. The study is anticipated to conduct an empirical investigation based on panel data from 287 prefecture�level cities from 2009 to 2021, aiming to evaluate the impact of China's Circular 2 Economy Demonstration City policy on carbon emissions. The objective is to determine the effectiveness of the circular economy in achieving the nation's 'Dual Carbon' targets and provide comprehensive insights for future policy refinements