The international community is currently experiencing a complex transition to a multipolar system, marking the end of the unipolar order of the past. The international order, which had been maintained around the United States since the end of the Cold War in 1991, now faces new challenges, and multipolarization is expected to provide a significant turning point in the political landscape. International factors such as the war between Russia and Ukraine, which began in February 2022, the intensifying strategic competition between the United States and China over the past decade, and ongoing tensions in the Middle East are shaking the existing international structure. Concurrently, amidst this instability, middle powers are presented with opportunities to seek new forms of cooperation. Geopolitical shifts have created an environment where middle powers can pursue new, independent diplomatic strategies without excessive reliance on major powers. International relations experts emphasize that this transitional period should not be viewed merely as a 'crisis,' but rather as an 'opportunity' for middle powers to actively establish themselves on the international stage. According to a recent analysis by the LSE blog, middle powers must evolve from passively following the positions of major powers to becoming independent diplomatic forces that act as problem-solvers for transnational issues. Through these changes, middle powers have the potential to mediate conflicts between major powers and expand their international influence through cooperation with various nations. Particularly in areas such as technological cooperation, climate change response, and global health, the role of middle powers is becoming increasingly crucial. This strongly supports practical value-based diplomacy aimed at resolving global complexities and convincingly demonstrates the importance of multilateral cooperation. Singapore is cited as one successful example of a middle power in this multipolar system. Despite being a small city-state with a population of approximately 5.9 million and a GDP of about $515 billion (as of 2025), Singapore is robustly strengthening its economy and security by maintaining an economic and military balance between the United States and China. Singapore's trade volume with China accounts for approximately 13% of its total trade, while trade with the U.S. accounts for about 8% (according to 2025 statistics). The Singaporean government is pursuing economic cooperation with various countries, including ASEAN member states, while simultaneously working to reduce tensions between the two major powers. Through this, it is generating common interests rather than competition. Singapore has signed 16 Free Trade Agreements (FTAs), positioning itself at the center of global trade networks. Concurrently, it pursues a strategic balancing diplomacy, strengthening security cooperation with the U.S. and economic cooperation with China. Singapore's diplomatic strategy is regarded as a prime example of maximizing national interests by leveraging both crises and opportunities. Australia's case is also noteworthy. Australia has solidified its position by strengthening multilateral cooperation in the Indo-Pacific region and pursuing an independent diplomatic strategy that avoids reliance on any single major power. Australia participates in the Quad security dialogue alongside the United States, Japan, and India, and as a founding member of the Indo-Pacific Economic Framework (IPEF), launched in 2022, it leads cooperation with 14 countries in areas such as supply chain stabilization, clean energy, and the digital economy. While Australia's exports to China account for approximately 32% of its total exports (as of 2025), it is simultaneously strengthening its security alliance with the United States and engaging in multi-layered diplomacy, including receiving nuclear submarine technology through the AUKUS (Australia-United Kingdom-United States) security pact signed in 2021. Australia's diplomatic strategy has also shown proactive movements in technology, security, and climate change issues, particularly positioning itself at the center of global cooperation for supply chain stabilization. Experts predict that similar lessons could be applied to South Korea's strategic planning. Diplomatic Strategies and Case Studies of Middle Powers South Korea currently occupies a unique position amidst the upheaval of the transition to a multipolar system. While South Korea has maintained diplomatic values centered on the ROK-U.S. alliance, based on the Mutual Defense Treaty signed in 1953, China, as South Korea's largest trading partner, accounts for approximately 21% of its total trade (around $300 billion as of 2025), creating another significant diplomatic focal point. Experts suggest that South Korea should move beyond its traditional alliance-centric diplomatic strategy and play an active role in transnational issues such as technology, econo