省会与周边城市旅游发展的共生关系是旅游地理学中一个值得关注的问题。论文基于2000— 2022年中国省会与周边城市旅游经济发展的相关数据对该现象进行实证分析。结果表明：省会与周边城市旅游发展存在“灯下黑”现象。总体而言，东北地区旅游经济的“灯下黑”现象最为严重，中部地区的“灯下黑”现象相对较弱。机理分析表明：中国省会与周边城市旅游经济总体上以正向非对称互惠共生关系为主，一定程度上造成“灯下黑”现象越来越明显。省会与周边城市旅游发展模式可以概括为资源驱动型与交通驱动型，省会周边城市旅游发展更加依赖外部条件。研究论证了城市旅游发展中“灯下黑”现象并分析其影响机理，进而提出了相关对策建议。

The symbiotic relationship between tourism development of provincial capitals and surrounding cities is a noteworthy issue in tourism geography. Is there a phenomenon of "dark under the light" or "bright under the light" between the two? By using the methods of primacy ratio, symbiosis theory, and optimal parameter geographic detector, this paper verifies this phenomenon based on related data of tourism economy from 2000 to 2022. The results indicate that there is a generally phenomenon of "dark under the light" in the tourism development of provincial capitals and surrounding cities, and this phenomenon has a strengthening trend. Generally speaking, the phenomenon of "dark under the light" about tourism economy in Northeast China is most severe, while is relatively weak in the Middle China; on the contrary, there is a phenomenon of "bright under the light". The mechanism analysis shows that there are two symbiotic modes between Chinese provincial capitals and surrounding areas: "positive asymmetric reciprocal relationship"and"parasitic relationship", with"positive asymmetric reciprocal relationship"being the main mode. The"positive reciprocal relationship"indicates that the tourism development of the provincial capitals and surrounding cities generally constitutes a benign system, which is beneficial to both parties; while"asymmetric"indicates that this relationship benefits one party more than the other, and benefits the tourism development of provincial capitals more than the surrounding cities.