From December 11th to 13th, a training session on technical, economic, and cost accounting methods for the chlor-alkali industry organized by CCAIA was held in Haikou, Hainan. More than 80 trainees from chlor-alkali production enterprises across the country participated in the training. Zhang Shoute, Vice Secretary General of CCAIA, Yang Jianrong, an expert from the Association′s Technical and Economic Network who has rich teaching experience and has participated in the drafting of national and group standards multiple times, and Liu Caihong, Senior Engineer of Tangshan Sanyou Chlor Alkali, provided detailed training on key policies, process technology status analysis and development trends in the chlor alkali industry, technical and economic accounting methods and cost accounting methods for major chlor alkali products, ion membrane electrolysis process and carbon emission accounting standards for polyvinyl chloride resin in the chlor alkali industry, and systematically exchanged and answered questions with the trainees. Li Qiong, the office director, presided over the training session and provided a systematic explanation on the newly revised reporting and summary output style of the Association′s chlor alkali technology and economic information network, as well as arrangements for related work next year.