Yi Jinn Industrial Co., Ltd. manufactures, processes and sells polyester textured yarns and related textile products. The company produces 100% semi-dull polyester textured yarn in specifications from 30D/72F to 1200D/288F using methods including light thermo setting, one-heater air-intermingled yarn, two-heater low torque and setting yarn, and one-heater wooly yarn; spandex air covering yarn series such as SG TOP/NOP for socks, denim, yoga cloth and sportswear; polyester filament yarn; polyester/nylon textured yarn; polyester textured color yarn via dope dyeing; composite yarn; cationic-dyeable polyester yarn; high shrinkage elastic fiber; and two-tone yarns including TTK and RTK for varied color effects. Branded products under Seagull and GreenGuard, the latter sourced from recycled polyester filament, support applications in sports and leisure wear, bath towels, stuffed toys, ladies' garments, men's pants, shirts, suits and home textiles; the company also offers man-made woven and knit fabrics, imports/exports textiles, leases real estate and develops properties. Yi Jinn operates through textile, leasing and general segments, with sales in Taiwan, Asia, Americas, Europe and Africa. Founded in 1981 and headquartered in Taipei, Taiwan, the company pursues upstream, midstream and downstream integration, advanced machinery adoption for productivity and environmental conservation, and development of differentiated high-value products amid global carbon regulations. In September 2025, Yi Jinn's board approves the sale of property for NT$758 million; it maintains focus on vertical integration and decarbonization to enhance competitiveness, reporting consolidated revenue of TWD3.43 billion for the trailing twelve months through 2024.