On July 19th, the group standard preliminary draft seminar on the "Technical Specification for Application Verification of Ion Membrane Caustic Soda Taking Waste Salt as Raw Material" kicked off in Tianjin. Zhang Xin, Vice President of CCAIA, Zhang Shoute, Vice Secretary General, Wang Li, Director of the Research Department, and Fan Hongbo, Secretary General of the Standardization Working Committee, attended the meeting. Among the participants were Leaders and responsible specialists from 18 drafting units, including Befar Group, Dadi Salt Chemical, Zhejiang Juhua, Shanghai Chlor Alkali, Shaanxi Jintai, and Shaanxi Beiyuan. Zhang Xin, Vice President of CCAIA, presided over the meeting and introduced the background and significance of the standard preparation. Zhang Shoute, Vice Secretary General of the Association, introduced the content of the initial draft of the standard and feedback from various enterprises. The attending enterprises made targeted discussions on the definition of waste salt, requirements for waste salt statistics and measurement, calculation methods, and detailed rules for waste salt application verification in the standard. After the meeting, the drafting team will revise and improve the standard text, complete the draft for collecting opinions as soon as possible, and orderly promote the publicity, review, and release of the group standard.