China, based on the independent, autonomous and peaceful foreign policy, is performing her diplomacy toward all over the world and wants the peace and stability of her neighboring countries, Korean Peninsula as well. Accordingly having the long, friendly and traditional relations with North Korea as the same socialist state, China has helped North Korea for a long time in political, economic and military aspects regarding her as an advanced base against the pressure of America. On the other hand, China has also entered into diplomatic relations with South Korea in need of her economic development, but she has been improving her relations with South Korea as an overall cooperative companion relations in political and military aspects, too. Therefore China has maintained and developed friendly relations with both South and North Korea, that\'s the result of long, historical ties. However, China has insisted on the denuclearization in Korean Peninsula and been against North Korea\'s nuclear development program. In fact, if North Korea made nuclear weapons, Japan would join this program and South Korea, too. Then, there will be produced a great strained relations around Korean Peninsula and that will break the peace and stability in Korean Peninsula, leading both South and North Korea into a disadvantageous situation. In conclusion, U.S.A. should cooperate with Japan, China and South Korea to check North Korea\'s nuclear development program, here is the great role of China. It is necessary that Korean Peninsula should be denuclearized for a long time. And Korean Peninsula should be a center to bloom the union of civilization as a geopolitical zone of interchange between the East and the West. China should strongly uphold this goal for the peace and stability of the surroundings.