The Tenth International Symposium on Engineering Plastics (EP’2023 Ningbo) will be held in Ningbo, Zhejiang Province, China, August 4-7, 2023. International Symposium on Engineering Plastics (EP) is a biannual academic conference organized by Institute of Chemistry, Chinese Academy of Sciences, aiming to provide a high-profile platform for world-wide polymer materials scientists to exchange up-to-date research progresses and share innovative ideas on the future development of polymer materials. The EP series were first launched in Beijing in 2001 and have been successfully held at different cities in China for 9 times over the past two decades. Due to the COVID pandemic, the EP’2021 was canceled. As China has recently eased the travelling restriction, we decide to resume the success legacy this August. The EP’2023 will continue the commitment to advancing polymer materials science and technology by setting its slogan as “Polymer Materials for a Harmonious World”, according to which five scientific topics seen below are to be arranged. The organization committee cordially invites all of you, scientists, engineers, and students involving in polymer synthesis, characterization, processing, and materials, to attend this symposium and have face-to-face discussion.