This research examines the future of China, which would play a pivotal role in determining the future of South Korea. Focusing on the chance of regime survival, the prospect of sustainable economic growth and the chance of conflict and cooperation with foreign countries, it aims at offering a comprehensive image of China around 2030. China’s future will not be completely different from the present image of contemporary China, According to the research, China will remain highly authoritarian with a little prospect of democratization while sustaining its economic growth although the growth rate declines. But China’s foreign relations with major countries such as the US, Japan, India and Australia will deteriorate as a result of heightened security competition elsewhere. The research provides a set of future strategies to a policy community in South Korea such as decreasing levels of trade dependence on China, considering the return to a quasi alliance system between the US, South Korea, and Japan, and rebuilding communication channels with China’s top leadership.