Anhui Huasu Co., Ltd. (stock abbreviation: Huasu Shares, 600935.SH) is located in Dingyuan County, Anhui Province. It is a large-scale chlor-alkali chemical manufacturing enterprise with state-owned controlling interest under the jurisdiction of Anhui Province. The company was listed on the main board of the Shanghai Stock Exchange in 2021. Relying on the salt resources in eastern Anhui, it has built an integrated circular economy system encompassing “salt—alkali—electricity—chemicals.” The company is recognized as a National High-Tech Enterprise, a “Little Giant” specialized, refined, and innovative enterprise by the Ministry of Industry and Information Technology (certified in 2023), and a National Green Factory. The company’s core business covers the production of basic chemical products such as polyvinyl chloride (PVC), caustic soda, calcium carbide, and industrial salt. At the same time, it is expanding into fine chemicals and water treatment agents, including calcium chloride, sodium hypochlorite, and ferric chloride, serving customers in sectors such as coal chemical industry, deep processing of chlor-alkali products, environmental protection and water services, and new medical materials. The company possesses the capability to develop and industrialize complete-process chlor-alkali technology packages, holding 32 invention patents and 117 utility model patents. Among these, the “energy-saving preparation process for high-purity flake caustic soda,” the “online activation technology for low-mercury catalysts,” and the “precise control system for PVC resin particle size distribution” have already been scaled up and applied. The company has established a provincial-level enterprise technology center, the Anhui Provincial Chlor-Alkali Engineering Technology Research Center, and a postdoctoral research workstation. In the past three years, its R&D investment has averaged 3.28% of revenue. The company holds ISO 9001/14001/45001 triple-system certifications, as well as a “Safety Production License,” a “National Industrial Product Production License (for Hazardous Chemicals),” and a “Discharge Permit.” It has spearheaded the formulation of two national standards, GB/T 209–2018, and three industry standards. Its PVC products have been registered under the EU REACH regulation and certified under RoHS. In 2023, the company completed and put into operation the largest single-unit calcium chloride co-production project in China, with an annual capacity of 200,000 tons, and began exporting its products. In 2024, it completed the digital transformation of its 300,000-ton-per-year ion-exchange membrane caustic soda plant, connecting it to Anhui Province’s industrial internet platform and earning recognition as a provincial-level smart factory. The company’s PVC production capacity stands at 1.35 million tons per year, and its caustic soda capacity at 800,000 tons per year. Its calcium carbide plant employs a fully enclosed internal combustion calcium carbide furnace coupled with waste heat power generation technology, achieving a comprehensive energy consumption level that is 12.6% lower than the advanced national standard. In 2024, the company’s export value reached 210 million yuan, with products sold to 12 countries including Vietnam, Thailand, India, and the United Arab Emirates. Its calcium chloride exports account for approximately 8.7% of the national total. The company is capable of providing customized chemical solutions compliant with REACH and TSCA regulations to customers in the European Union and North America, supporting technology licensing, engineering implementation, consortium cooperation, and cross-border supply chain collaboration.