Tangshan Sanyou Chemical Industries Co., Ltd. (Stock Code: 600409.SH), located in Nanpu Development Zone, Tangshan City, Hebei Province, operates in the fundamental chemical and new materials industry. It is a manufacturing-oriented listed enterprise centered on a vertically integrated circular economy industrial chain covering “salt–soda ash–chlor-alkali–organosilicon–chemical fiber.” As of 2025, the company possesses annual production capacities of 4.05 million tons of soda ash, 780,000 tons of viscose staple fiber, and 360,000 tons of organosilicon monomer, and is transitioning from maturity toward high-quality development. Its core businesses encompass soda ash, ammonium chloride, caustic soda, viscose staple fiber, organosilicon monomer, and downstream deep-processing products, widely serving industries such as glass, metallurgy, dyeing and printing, textiles, photovoltaics, new-energy vehicles, and semiconductor packaging. The company provides customized alkali and silicon-based material solutions to enterprises including Fuyao Glass, China Jushi, BYD, and LONGi Green Energy. Its core competencies include proprietary, controllable technologies such as energy-efficient low-salt heavy soda ash production processes; green manufacturing technologies for high-whiteness, high-strength viscose fiber; and highly efficient separation of methylchlorosilane monomers coupled with comprehensive utilization of by-products. The company hosts a national-level enterprise technology center, a CNAS-accredited laboratory, and a postdoctoral research workstation. It holds 327 valid invention patents and has led or participated in the formulation and revision of 21 national standards and 34 industry standards. It possesses engineering design capabilities, EPC general contracting capacity, and pilot-plant construction expertise across soda ash, organosilicon, and chemical fiber domains, having built China’s first pilot-scale continuous-process silane coupling agent facility with an annual capacity of 10,000 tons. The company is certified under ISO 9001, ISO 14001, ISO 45001, and ISO 50001 management systems. Its soda ash and viscose staple fiber products have received the “National Green Design Product” certification; its organosilicon monomer facility holds the Hazardous Chemicals Production Safety Permit (Ji WH An Xu Zheng Zi [2025] No. 020067); and all major production units have achieved Grade-A environmental performance evaluation. Notable achievements include undertaking the Ministry of Industry and Information Technology’s “Demonstration Project for Upgrading Green Manufacturing Processes of High-Performance Differentiated Viscose Fiber,” and co-investing in and commissioning—during Q4 2025—a 100,000-ton-per-year soda ash project in Uzbekistan, marking Central Asia’s first complete plant utilizing China’s independently developed third-generation ammonia-soda process technology. Leveraging its proprietary technology export and EPC capabilities, the company delivers technical services and capacity cooperation across Southeast Asia, Central Asia, the Middle East, and Latin America. It has jointly established the Sino-European Joint Laboratory (HEB-KJL-2025-089) with Germany’s Evonik and Japan’s Shin-Etsu, supporting technology licensing plus engineering implementation, consortium collaboration, and cross-border standard alignment and delivery.