On from May 7th to 8th, general secretary of the CPC Central Committee and President Xi Jinping met with the chairman of the DPRK Labour Party and Kim Jeong-eun, chairman of the State Council in Dalian. This is followed by the end of March this year, after Kim Jeong-euns visit to Beijing, the leaders of the two sides met again more than 40 days later. Zheng Jiyong, director of the Korean research center of Fudan University, told the ring 8 that the meeting was critical, the highest level, and the depth of the content, revealing a lot of information on the development of Sino Korean relations and the issue of the denuclearization of the peninsula. During the meeting, President Xi Jinping mentioned that in the historic first meeting of the China and the DPRK leaders in Beijing in March this year, the two sides reached four principles on the development of Chinas relations with the DPRK in the new era. Zheng Jiyong believes that the connotations of these four principles are very rich. First, the traditional friendship between China and the DPRK is a valuable asset shared by both sides. To develop friendly and cooperative relations between China and the DPRK is the unswerving policy of both sides and the only right choice. Zheng Jiyong believed that the first point emphasized the historical tradition of China and Korea. On the basis of traditional friendship, the two sides will develop new friendly relations of cooperation between China and DPRK for the future under the new historical conditions. Second, China and DPRK are both socialist countries. Bilateral relations are of great strategic importance and we need to strengthen solidarity, cooperation and exchanges. Zheng Jiyong said the second point shows the core of Sino Korean relations in the new era. The formulation of China and Korea is a socialist country has rarely appeared in recent years, and can be understood in combination with exchanges and mutual learning. With the holding of the DPRK summit, DPRK has shown itself to be a normal country with a focus on economic development and willingness to integrate into the international community. In this regard, the DPRK can learn from Chinas experience and way of being a socialist country. Third, high-level exchanges between the two parties have an irreplaceable role in leading bilateral relations. Both sides should keep regular contacts, strengthen strategic communication, increase understanding and mutual trust, and maintain common interests. Fourth, ramming the foundation of civil friendship is an important way to promote the development of Sino Korean relations. We should strengthen exchanges and exchanges between the two peoples through various forms and create a good foundation for the development of China DPRK relations. Zheng Jiyong believes that the fourth point will lay a solid foundation for the future development of Sino DPRK relations. In the past exchanges between China and DPRK, the exchange of people has always been a short board. The two sides stressed the importance of strengthening exchanges between the people and made clear that this short board would be complemented. This also indicates that China may provide more help in the economic, political and other aspects when the DPRK becomes a normal country. Zheng Jiyong said that these four principles and common principles constituted an organic unity of China DPRK relations and formed a new orientation for Sino DPRK relations. During the meeting, leaders of the two sides also discussed the issue of denuclearization of the peninsula. Kim Jeong-eun said that achieving the denuclearization of the Korean Peninsula is a consistent and clear position of the DPRK. As long as the parties concerned eliminate the hostile policy and security threat to the DPRK, the DPRK is not required to have nuclear weapons, and denuclearization can be achieved. It is hoped that mutual trust should be established through the dialogue between the United States and the United States, and the relevant parties should take a responsible step and synchronization measures to promote the political settlement of the Peninsula issue in an all-round way, and ultimately achieve the denuclearization of the peninsula and a lasting peace. Zheng Jiyong analysis said that, on the one hand, the meeting reflected North Koreas importance to Chinas role in the Korean Peninsula and the other side, the DPRK was also delivering words to the United States. Zheng Jiyong said that Kim Jeong-eun made it very clear that denuclearization can be realized and that the DPRK and the United States should establish mutual trust. But he also proposed the way North Korea wants to solve the nuclear issue of the peninsula, that is, phased, synchronous measures, excluding the US proposed complete, verifiable, irreversible CVID in one step of the abandonment of nuclear methods. Kim Jeong-eun also passed the message to the United States through this meeting - North Korea has done a lot, but the United States has not yet expressed enough sincerity.