2, can't use force to solve the problem, it will make the peninsula war, chaos, China will not allow.
3. China's own legitimate national security interests must be effectively safeguarded and guaranteed.
Extended data:
2016 February 12, Foreign Minister Wang Yi accepted an exclusive interview with Reuters in Munich, Germany, and answered the bottom line about the North Korean issue when answering China's policy on the situation on the Korean Peninsula.
Wang Yi said that we will continue to cooperate with the international community and unswervingly push forward the denuclearization of the peninsula. The focus of the nuclear issue on the peninsula lies in both the United States and North Korea. We would like to urge the United States and the DPRK to sit down and talk, solve each other's legitimate concerns, and finally achieve the goal that everyone hopes.
When answering the question that the United States may deploy the "Sade" anti-missile system in South Korea, Wang Yi said that we are seriously concerned that the United States may deploy the "Sade" anti-missile system in South Korea. The coverage of "Sade" anti-missile system, especially the monitoring range of its X-band radar, far exceeds the defense needs of the peninsula and goes deep into the hinterland of the Asian continent, which will not only directly harm China's strategic security interests.
This will also harm the security interests of other countries in the region. There are two old sayings in China: one is Xiang Zhuang's sword dance, which is intended to pay tribute to the public. There is another saying that everyone knows Si Mazhao's heart. We resolutely oppose any country using the nuclear issue on the peninsula to infringe on China's legitimate rights and interests.
References:
Xinhuanet-Wang Yiliang's Three Bottom Lines on North Korea Issue