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Zhejiang Ruiou Investment Co., Ltd. is located in the historically and culturally renowned city of Hangzhou. Leveraging years of research and development experience and technological advantages, the company specializes in the independent innovation, R&D, production, sales, and related technical services of environmentally friendly polyvinyl chloride (PVC) stabilizers. The company currently offers four main product series: methyltin heat stabilizers, calcium-zinc composite stabilizers, liquid composite heat stabilizers, and PVC lubricants. It is one of the leading manufacturers and service providers in China with a relatively comprehensive range of PVC heat stabilizer products and a large production scale. The market share of methyltin heat stabilizers and other heat stabilizers produced by the company ranks among the top in the country. A comprehensive product series portfolio has been gradually established, and the company's expert image in providing "PVC Processing Application Solutions" is increasingly taking shape. The company holds multiple independently developed patented products and has developed several production lines with unique processes, high automation, and advanced technology. The research institute boasts a team of highly skilled and experienced professionals, providing strong support for product development and technological innovation. The company is also a council member of the China Plastics Processing Industry Association and the Heat Stabilizer Branch. It has participated in the formulation of national standards such as "Heat Stabilizers for Plastics—Technical Requirements for Organotin Heat Stabilizers" and "Heat Stabilizers for Plastics—Calcium-Zinc Heat Stabilizers." Additionally, it is a major contributor to the industry guidance manual "Application Technology of PVC Heat Stabilizers." Guided by the corporate spirit of "Diligence, Ambition, Exploration, and Innovation," the company is committed to continuously providing more efficient and multifunctional green environmentally friendly PVC stabilizers. At the same time, we will continue to dedicate ourselves to the cause of environmental protection and contribute to preserving the ecological environment.