collaborated with a high-end piano brand to customize core hardware components for grand piano pedals, including key parts such as pedal shafts, transmission connecting rods and dampers. Using high-toughness carbon steel material, through precision turning and manual grinding processes, the component error is controlled within 0.01mm, ensuring smooth pedal stepping, precise transmission, and no jamming or abnormal noise. The surface is treated with matte wire drawing, which balances wear resistance and visual beauty, conforming to the high-end positioning of pianos. This customized component helped the partner improve the piano playing feel score, with product sales increasing by 45% year-on-year, becoming an exclusive supporting supplier for high-end grand pianos.