In conclusion, China plays a critical role in the traditional security challenges in the Asia-Pacific and is a major role in promoting the denuclearization of the Korean Peninsula. It could be said that the U.S. also plays a critical role in all the three security challenges. Which is clear that the U.S. and China will be essential factors in searching for peace and stability in the region, and play major roles in shaping the future security architecture of the Asia-Pacific region.