On September 15, Zhang Wenlei, the president of the association, Zhang Xin, the vice president, Li Qiong, the director of the Information Department, and related comrades held an on-site exchange meeting with Tianjin Nankai University. Drive the high-quality development of the industry, and conduct in-depth exchanges on key technical problems in the current industry. Li Wei, Deputy Director of the Science and Technology Research Department of Nankai University and Professor of the School of Chemistry, presided over the meeting. Kong Deling, Minister of the Technology Research Department, Professor of the School of Life Sciences, and more than ten related persons from the School of Chemistry, the School of Environmental Science and Engineering, and the Office of Technology Development and Achievement Transformation Professors and scholars attended the conference. Zhang Wenlei introduced the development of the chlor-alkali industry and the key work of the association, especially the ideas and practices of the association in the field of production, education and research in the future. The Office of Technology Development and Achievement Transformation of Nankai University introduced the production-university-research situation in the relevant disciplines of Nankai University. Several professors made an introduction to the industry-related high-salt wastewater treatment, improvement of PVC production auxiliaries, and research and development of downstream special materials for PVC. The two sides exchanged and discussed key technical problems and reached a consensus on strengthening exchanges and cooperation in the next step.