Group 1 - Gansu Jiugang Group Hongxing Steel Co., Ltd. applied for a patent for a polishing process for medium-thick stainless steel plates, aimed at improving grinding efficiency and surface quality [1] - The patent application was published under CN120480761A, with an application date of June 2025 [1] - The process involves semi-wet grinding during rough grinding and full-wet grinding during fine grinding, increasing grinding efficiency by 20-30% and achieving a surface roughness of 0.45-0.65µm [1] Group 2 - Gansu Jiugang Group Hongxing Steel Co., Ltd. was established in 1999 and is primarily engaged in black metal smelting and rolling processing [2] - The company has a registered capital of approximately 626.34 million RMB [2] - It has invested in 36 enterprises, participated in 5000 bidding projects, and holds 2788 patent information along with 25 trademark information [2]

Group 1 - Nanjing Steel Co., Ltd. has applied for a patent for a type of steel plate designed for icebreaking ships in extremely cold environments, with a yield strength of ≥390MPa and tensile strength of ≥510MPa [1] - The chemical composition of the steel plate includes specific percentages of elements such as C, Si, Mn, P, S, V, Ni, Cr, Nb, Al, Ti, Ca, and N, ensuring its mechanical performance at temperatures as low as -60°C [1] - The patent application was filed on April 2025, and the publication number is CN120272838A [1] Group 2 - Nanjing Steel Co., Ltd. was established in 1999 and is primarily engaged in the smelting and rolling processing of ferrous metals [2] - The company has a registered capital of approximately 616.51 million RMB and has invested in 58 enterprises [2] - Nanjing Steel has participated in around 5000 bidding projects and holds 4537 patents along with 18 trademark registrations [2]

Group 1: Patent Application - A patent titled "A Low-Cost Cold-Rolled Low-Alloy High-Strength Steel Production Method" has been applied for by several companies including Henan Angang Zhoukou Steel Co., Ltd., Anyang Iron and Steel Group Co., Ltd., Henan Steel Group Co., Ltd., and Anyang Iron and Steel Co., Ltd. The patent was published as CN119899930A with an application date of February 2025 [1] - The patent outlines a production method that includes several steps: hot rolling, acid rolling, continuous annealing, and galvanizing, ensuring the mechanical properties and surface quality of the final product [1] Group 2: Company Profiles - Henan Angang Zhoukou Steel Co., Ltd. was established in 2018, located in Zhoukou City, with a registered capital of 539.81 million RMB. The company has participated in 3,458 bidding projects and holds 16 patents [2] - Anyang Iron and Steel Group Co., Ltd. was founded in 1995, based in Anyang City, with a registered capital of 377.19 million RMB. The company has invested in 32 enterprises, participated in 4,570 bidding projects, and holds 519 patents [2] - Henan Steel Group Co., Ltd. was established in 2023, located in Zhengzhou City, with a registered capital of 2 billion RMB. The company has invested in 4 enterprises and participated in 5,000 bidding projects [2] - Anyang Iron and Steel Co., Ltd. was founded in 1996, also based in Anyang City, with a registered capital of 287.24 million RMB. The company has invested in 26 enterprises, participated in 5,000 bidding projects, and holds 957 patents [3]