Group 1 - The State Intellectual Property Office of China has granted a patent for a device and method for preparing additives for cast iron, with the patent number CN121087352B, applied for by Shanghai Zhumi Technology Co., Ltd. and Shaanxi Light Point Material Technology Co., Ltd. on November 2025 [1] - Shanghai Zhumi Technology Co., Ltd. was established in 2016, located in Shanghai, primarily engaged in wholesale, with a registered capital of 1 million RMB. The company has invested in 2 other enterprises and holds 46 trademark records and 27 patent records [1] - Shaanxi Light Point Material Technology Co., Ltd. was established in 2025, located in Xi'an, primarily engaged in technology promotion and application services, with a registered capital of 500,000 RMB. The company has 1 patent record [1]