Group 1 - The core point of the article is that Huayu Automotive Electric Systems (Shanghai) Co., Ltd. has applied for a patent for a rotor sleeve injection molding device, system, method, and rotor, which aims to enhance rotor strength while addressing performance issues in electric motors [1] Group 2 - The patent application, published as CN 120756033 A, was filed on September 2025, and the invention includes an injection molding component and a tubular rotor sleeve designed to fully cover the rotor assembly [1] - The rotor sleeve is open at both ends, and the injection molding component is positioned at one end to inject molding material into the gap between the rotor sleeve and the rotor assembly, thereby fixing them together [1] - The company, established in 2018 and located in Shanghai, has a registered capital of 421 million RMB and has participated in 133 bidding projects, holds 56 patents, and possesses 36 administrative licenses [1]