On April 1, 2016 local time, the fourth Nuclear Security Summit was held in Washington D.C., capital of the US. President Xi Jinping attended the summit and delivered an important speech entitled "Strengthen Global Nuclear Security Architecture and Promote Global Nuclear Security Governance". By centering on the building of a global nuclear security architecture featuring fairness and win-win cooperation, Xi Jinping comprehensively expounded on China's policies and propositions, introduced China's new progress in nuclear security, and announced China's measures in strengthening domestic nuclear security and promoting international cooperation.

The summit, themed with "Strengthen Global Nuclear Security System", was attended by leaders or representatives of 52 countries as well as heads of international organizations.

Xi Jinping pointed out in his speech that in the third Nuclear Security Summit held in The Hague, he called for the building of a global nuclear security architecture featuring fairness and win-win cooperation. To realize the objective, we should step up political input, pool international consensus, build a new type of international relations with win-win cooperation at the core, stick to the direction of addressing both symptoms and root causes and advance global security governance. We should step up national responsibility, plan and implement nuclear security strategy and tighten up a line of defense that is sustainable. We should also step up international cooperation, forge a community of shared future on nuclear security, and enhance the momentum of coordination for common progress. All parties should also step up the culture of nuclear security and create an atmosphere of joint efforts and shared benefits.

Xi Jinping noted that since the Summit in The Hague, China has made new progress in the field of nuclear security. In pursuit of excellence through constant improvement, China has strived to explore effective ways to strengthen nuclear security. It has already incorporated nuclear security in its national security system, written it into the National Security Law and defined its strategic nature. Keeping its promise on nuclear security, China has earnestly fulfilled its international obligations and political commitment. Aspiring for win-win cooperation, China is vigorously promoting international exchanges and cooperation.

Xi Jinping stressed that China will step up its own nuclear security, actively advance related international cooperation, share its technologies and expertise and contribute resources and platforms. China will build a network for capacity building on nuclear security, promote cooperation model for less use of highly-enriched uranium (HEU), implement the action plan on strengthening security of radioactive sources, launch the technological support initiative against crisis of nuclear terrorism and promote its national security monitoring system for nuclear power. As long as we cooperate in good faith and continue to step up nuclear security, nuclear energy will certainly deliver a brighter future to mankind.

The leaders attending the summit briefed on the policy, propositions and measures of their respective countries in their speeches, appreciating the positive contributions made by the nuclear summits to safeguarding and strengthening the global security of nuclear materials and facilities, and expressing their willingness to further boost international cooperation and promote global peace and security in the post-summit era.

Yang Jiechi and others were present at the summit.