Introduced the concept of regional governance, which is an institutionalized model of social coordination on specific issues at the regional level, aimed at generating binding rules and public goods and services. The entities of regional governance are mainly regional institutions (organizations), such as ASEAN, EU, and AU, which are products of cooperation and integration among regional countries. In recent years, regional organizations have developed rapidly, with overlapping members and issues, forming "overlapping regionalism" and increasing the complexity of regional governance. There is competition and cooperation between regional organizations, and this article uses the concept of "multiple integration" to describe this phenomenon, exploring its underlying motivations and impact on regional governance. The hot issues in the Eurasian region continue to arise, and regional governance is showing a differentiated effect. Eurasian countries have not been independent for long, and there are historical and cultural disputes. In reality, there are territorial disputes, ethnic and religious conflicts, and regional governance is difficult. In the 1990s, the Eurasian region faced both traditional and non-traditional security threats. After entering the 21st century, under the regulation of the international community, regional conflicts have eased to some extent, forming a 'frozen conflict'. However, recently, the "frozen conflicts" have been unfrozen one after another, with the emergence of the Crimean crisis, the Nagorno Karabakh conflict, the Russia-Ukraine conflict, etc., indicating that governance in the Eurasian region has failed, and regional organizations have failed to effectively enhance national cooperation and integration. Instead, the competition and cooperation of regional organizations have triggered conflicts between countries. There are nearly 20 regional (inter) organizations in the Eurasian region, with most countries participating in multiple organizations. These regional organizations are mostly led by Russia, the European Union, and China, which poses coordination challenges and increases the difficulty of regional governance. The conflicts and cooperation among regional organizations have led to the coexistence of division, integration, and fragmentation in the Eurasian region. The intensification of anti globalization and geopolitical games has made regions increasingly important, enhancing the significance of regional governance research. This article attempts to combine regional power structures and regional norms (regionalism) to explore the motives and effects of regional "multiple integration" from the perspective of power relations within and outside the region and whether regional norms are compatible. By refining the regional concepts advocated by China and establishing coordinated relationships with Eurasian organizations in practice, we aim to improve regional cooperation and integration, enhance regional governance, and achieve the global governance concept advocated by China to take root in the Eurasian continent.

1、 Literature analysis

We have delved into the phenomenon of "multiple integrations" in international organizations and regional governance, with a particular focus on the Eurasian region. Firstly, the concept of overlapping regionalism in regionalism theory was analyzed, pointing out that the phenomenon of multiple functionally similar regional organizations or countries participating in multiple regional organizations may lead to rule conflicts, competition, and ineffective regional governance. Subsequently, the international institutional theory, including mechanism complexity and realistic institutionalism, was discussed. These theories explain how regional cooperation and integration construct regional organizations, and analyze the impact of mechanism complexity on global governance. In addition, the chapter also explores the phenomenon of "multiple integrations" in the Eurasian region, including the Commonwealth of Independent States, the Collective Security Treaty Organization, and the Shanghai Cooperation Organization, which compete with organizations based on Western values and affect the effectiveness of regional governance. The study points out that the motivation for regional countries to participate in regional affairs, as well as the influence of the enthusiasm of major countries outside the region towards regional affairs of small countries in the region. Finally, the chapter points out the shortcomings of existing research, including insufficient attention to the coexistence of competition and cooperation among regional organizations, a lack of exploration of the phenomenon of "multiple integrations" from a comparative regionalism perspective, and insufficient research on the impact of regional norms on regional governance.

2、 International Organizations and Regional Governance: An Analytical Framework

Regional governance is influenced by the interaction between the dominant country in the region and major powers outside the region, as well as different regional norms. By constructing regional organizations to achieve governance goals, overlapping and competing regional organizations are formed, resulting in "multiple integrations". Regional organizations are international organizations that are continuous institutional arrangements constructed by three or more geographically adjacent countries. They generally overlap and nest, compete and cooperate with each other, and affect the effectiveness of regional governance. Regional governance forms four types: mutually reinforcing, cooperative, conflicting, and segmented, which respectively reflect the governance effects of integration and fragmentation. In cooperative regional governance, regional organizations have different goals, but regular interaction and communication form cooperative relationships. In mutually reinforcing regional governance, regional organizations interact closely, have harmonious relationships, and cooperate with each other to handle issues. In the governance of conflict prone areas, there are differences in the goals and means of regional organizations, and there is less competition and interaction. In the governance of segregated regions, the goals and means of regional organizations are different and there is no interaction. Countries are forced to join one of them, and countries in the same region belong to different camps.

3、 Eurasian 'Multiple Integration': Evolution and Differentiation of Regional Governance

The Eurasian region presents a phenomenon of "multiple integrations" in international organizations and regional governance, with Russia, the European Union, and China playing important roles respectively. Russia has led the construction of the Commonwealth of Independent States, the Eurasian Economic Union, and the Collective Security Treaty Organization, while the European Union has proposed the "Neighborhood Policy" and "Eastern Partnership" plans. China has advocated the Shanghai Cooperation Organization, the "the Belt and Road" initiative and the "Belt and Alliance" docking. The regional organizations led by these major powers and the organizations shaped by small countries in the region, such as the GUAM Group, the Central Asian Economic Cooperation Organization, and the Black Sea Economic Cooperation Organization, jointly influence the evolution and differentiation of regional governance.

4、 Conclusion

Explored the impact of regional "multiple integration" on governance effectiveness, and constructed four governance models from two dimensions: the relationship between major powers inside and outside the region and regional norms. Analyzed the phenomenon of "multiple integration" in the Eurasian region and its differentiation and integration effects on regional governance. As the dominant country in the region, Russia's interaction with major powers such as the European Union and China has led to polarization in regional governance. The governance of Eastern Europe and the South Caucasus region has evolved from a cooperative to a conflict and compartmentalized approach, showing a fragmented effect; The governance in Central Asia has shifted from a cooperative to a mutually reinforcing approach, with significant integration effects. Regional normative competition and major power relations also affect the integration of sub regions. The article analyzes the relationship between regional organizations from the perspective of interaction between major powers within and outside the region and regional norms, and elaborates on the evolution and differentiation of regional governance and its impact on global governance. The improvement of regional governance helps to maintain regional peace and stability, promote regional development, limit anti globalization, and promote global governance. Regionalism is the foundation of regional governance, and Eurasia is a good case study of regionalism in the non Western world. Comparative regionalism research needs to broaden its perspective, test the applicability of theories in the non Western world, and provide direction for future research.