On the 22nd, the UN Security Council held an open meeting on "strengthening dialogue and cooperation and safeguarding common security" at the initiative of China, the rotating presidency of this month. Zhang Jun, permanent representative of China to the United Nations, presided over the meeting. In his speech, he pointed out that respecting the sovereignty and territorial integrity of all countries is the basis for achieving common security and the "golden rule" for state to state exchanges. Zhang Jun said that the important principle of respecting national sovereignty and territorial integrity established by the UN Charter is the cornerstone of modern international law and international relations. If this principle is ignored and abandoned, the entire international legal system will shake and the world will return to the jungle law, and common security will be impossible to speak of. We must take a clear-cut stand and always respect the sovereignty and territorial integrity of all countries, respect the development path and social system independently chosen by the people of all countries, and respect the efforts of all countries to safeguard national unity and national unity. This is the "golden rule" of state-to-state exchanges and the basis and boundary for achieving common security. China has always respected the sovereignty and territorial integrity of other countries, upheld international fairness and justice, and supported the efforts of the international community to achieve common security. At the same time, China will also take all measures to firmly safeguard its sovereignty and territorial integrity. Zhang Jun said that firmly establishing a security concept that meets the needs of the times is the prerequisite for achieving common security. In the era of globalization, the world is living in peace and security. To achieve their own security, countries cannot ignore the legitimate security concerns of other countries, build their own security on the basis of other countries' insecurity, or put their own security fence at the door of others' homes. Clinging to the Cold War mentality and engaging in unilateralism, zero sum game, group confrontation and power politics will not only be difficult to ensure their own long-term security, but will also lead to the escalation of crises and the opposite of common security. In this regard, the problems and lessons brought by NATO's eastward expansion are profound. Zhang Jun said that a stable strategic security environment is the bottom line for safeguarding common security. Driven by the so-called "great power strategic competition" thinking, the global strategic security environment is deteriorating. The international non-proliferation system represented by the Treaty on the non proliferation of nuclear weapons is facing the most serious challenges since the end of the cold war. Countries with the largest nuclear arsenals should fulfill their special and priority responsibilities to further substantially and substantially reduce their nuclear arsenals in a verifiable, irreversible and legally binding manner. Zhang Jun said that an effective global security governance system is a necessary condition for achieving common security. The UN Security Council is the core of the international collective security mechanism and the most authoritative and legitimate institution of the multilateral security system. It plays an irreplaceable role in safeguarding common security. All countries should adhere to genuine multilateralism, support the United Nations and Its Security Council to play an effective role, and actively respond to the needs of the times and the expectations of all parties. United Nations Secretary General Guterres and Gustavo zlavinin, President of the tenth Review Conference of the Treaty on the non proliferation of nuclear weapons, attended the meeting and gave a briefing. (news agency)