Singapore has close security and economic ties with the United States and China at the same time, but it responds independently and in principle. This could provide implications for South Korea in a similar situation. Since its independence from Malaysia in 1965, Singapore's geopolitical vulnerability has been a key foreign policy driver. The consistent goals of Singapore's diplomacy after independence are, first, to secure the right to survive and develop. Second, ensuring economic development and sustainable prosperity by maintaining reliable and deterrent defense and participating in a free and open international trade system. Third, by actively participating in ASEAN activities, good-neighborly friendly relations with local countries are maintained, and Singapore's right to speak abroad is secured through strengthening regional integration. Fourth, promotes the creation of a peaceful security environment in Southeast Asia and the Asia-Pacific region. Accordingly, Singapore is implementing a non-aligned, balanced, and flexible pragmatic diplomacy based on the following principles: secure a prosperous economy with political stable; independent and balanced diplomacy to secure sovereignty; seeking good-neighborhood friendship and multilateralism aim to be a friend to all, but an enemy of none; respect for international law and norms. Singapore, like other countries in the region, is affected by the U.S.-China hegemonic competition. This is because Singapore also has close economic and military-security relations with both the United States and China. Singapore openly supports the U.S.' regional rebalancing strategy but is careful to distinguish it from a containment aims to China, is also developing practical cooperations with China in terms of military security as well as economy at the same time. It may seem dual, but Singapore trying to maintain a dynamic balance between the United States and China that can secure its own survival and national interests.