As the problem of conflict between development and security is getting more complex, how to seize the opportunities brought by RCEP's implementation to deepen economic and trade cooperation in East Asia so as to promote regional economic development has become a common topic for China, Japan and ROK. Against this backdrop，the 9th CJK Cooperation Dialogue co-organized by Japan Economic Foundation, China Institute for Reform and Development, China Public Diplomacy Association and East Asia Foundation, was held in Tokyo and Haikou via video link on 15 November 2022, with the support of the Trilateral Cooperation Secretariat. More than 50 experts and media representatives from the three countries participated in the one-day event.