2021 3rd International Conference on Polymer Synthesis and Application (ICPSA 2021) will be held on July 23-25, 2021 in Nanjing, China. ICPSA 2021 provides an enabling platform for innovative academics, engineers and industrial experts in the field of synthesis and application of polymer to exchange new ideas and present research results. This conference also promotes the establishing of business or research relations among global partners for future collaboration. We hope that this conference could make significant contribution to the update of knowledge about these latest scientific field. We sincerely invite you to participate in ICPSA 2021 and look forward to seeing you in Nanjing!