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Sales of various domestic and international electronic insulation materials (including PET film materials from Japan's Toray, South Korea's SKC, USA's DuPont, UK's KODAK PET film; light-shielding materials from Japan's SOMA and KIMOTO; PC film materials from Taiwan's Yixin, USA's GE, Japan's Sumitomo, among others); provision of professional processing services, including the production of insulation gaskets, optical components, mobile phone lens light-shielding sheets, and other stamped products, along with supporting precision slitting, slicing, laminating, and more. The products are primarily used in the IT and precision electronics industries, serving as components for high-tech products such as mobile phones, digital devices, movement mechanisms, computers, and precision motors.