Group 1 - Heng Er Da (300946.SZ) signed a strategic cooperation framework agreement with Tian Gong International (00826) to collaborate on the application of powder high-speed steel and high-nitrogen steel in planetary roller screw manufacturing [1][2] - Tian Gong International is the only global manufacturer of a full range of powder products, with its powder steel certified by the North American Die Casting Association (NADCA), breaking a 30-year monopoly held by European and American companies [1] - Heng Er Da will purchase no less than 100 tons of cutting tool materials annually from Tian Gong International for five years starting in 2026, totaling at least 600 tons [1] Group 2 - Tian Gong International's self-developed high-nitrogen alloy TPMDC02A was delivered to Jiangsu Runfu Power in early July for mass production of planetary roller screws, making it the first domestic company to apply high-nitrogen steel in this area [2] - The collaboration aims to enhance the precision and yield of Heng Er Da's rolling components, addressing the issues of low processing efficiency and high costs in domestic screw manufacturing [2] - This partnership marks a commercial milestone for Tian Gong International's powder steel and high-nitrogen steel technologies, highlighting its strategic positioning in the humanoid robot and high-end equipment sectors [2]