On March 13, 2023, the proponents of "Plastic Pollution and Environmentally Sustainable Plastic Trade" (IDP) held the first informal dialogue meeting in 2023. The meeting was chaired by Ambassador Jose Valencia of Ecuador and attended by over 100 representatives from WTO members, international organizations, non-governmental organizations, and academia. Ambassador Li Chenggang attended the meeting and delivered a speech, pointing out that IDP has had a broad international impact through more than two years of dialogue. For example, the parties involved in the United Nations Environment Programme (UNEP) negotiations on ending plastic pollution are increasingly recognizing the importance of trade in the international response to plastic pollution. Some member customs departments are actively promoting the reform of the World Customs Organization coordination system based on IDP discussions. The IDP dialogue fully embodies the principles of openness, transparency, and inclusiveness, attaches great importance to development and capacity-building issues, continuously improves transparency, and creates a good atmosphere of solidarity and cooperation in the WTO. The 2023 dialogue will determine whether IDP can achieve substantive results on MC13. Ambassador Li welcomes all interested members to join and hopes that all parties will engage in in-depth dialogue and discussion to jointly contribute to IDP's achievements on MC13. After the opening guest spoke, the United States officially announced its accession to IDP. The conveners of the three groups of IDP reported on their recent discussions, and several members and representatives of international organizations spoke successively, providing suggestions on the priorities of IDP's work in 2023 and how to achieve practical results on MC13.