Enhancing nuclear security is a never-ending process. As long as we continue to tap nuclear energy, we shall not stop our efforts to enhance nuclear security. First, we should place equal emphasis on development and security, and develop nuclear energy on the premise of security. The peaceful use of nuclear energy is important to ensuring energy security and tackling climate change. Like Prometheus who gave fire to humanity, the peaceful use of nuclear energy has sparked a flame of hope and opened up a bright future for mankind. On the other hand, without effective safeguards for nuclear safety and without an adequate response to the potential security risks of nuclear materials and facilities, such a bright future will be overshadowed by dark clouds or even ruined by resulting disasters. Therefore, we must strictly abide by the principle of making safety the top priority if we are to keep the flame of hope for nuclear energy development burning forever. We must follow the approach of enhancing security for the sake of development and promoting development by upholding security, and bring the goals of development and security in alignment with each other. We must convince the national governments and nuclear power companies of all countries that developing nuclear energy at the expense of security can neither be sustainable nor bring real development. Only by adopting credible steps and safeguards, can we keep the risks under effective control and develop nuclear energy in a sustainable way.