On May 22nd, the seminar of major trichloroethylene and tetrachloroethylene production enterprises organized by the Trichloroethylene and Tetrachloroethylene Professional Committee of CCAIA was held in Chongqing. Over 40 representatives from key enterprises such as Zhejiang Juhua, Ningbo Juhua, Inner Mongolia Dakang, Chongqing Yingtianhui, Luxi Chemical, Yibin Tianyuan, Haifeng Heyui, Shandong Befar, Shandong Xinlong, Dongying Huatai, Chongqing Tianyuan, Yidong Dongxing, and Jiujiang Jiuhong participated in the seminar. The seminar was hosted by Zheng Jiebin, the Deputy Secretary-General of CCAIA, and Tian Shijing, the Chairman of Chongqing Yingtianhui, delivered a speech. The seminar heard special reports on the quotas and current status of HFC-134A and R125, the current status of the tetrachloroethylene industry, the current status of the trichloroethylene industry, technological progress, safety, environmental issues, and the current status of the calcium carbide industry. Enterprises exchanged information on the production and operation of trichloroethylene and tetrachloroethylene in 2023 and from January to April this year, as well as their enterprise development plans, and put forward opinions and suggestions on the work of the Professional Committee.