Group 1 - The core point of the article is that Ningbo Kairui Sealing Technology Co., Ltd. has obtained a patent for a "leak-proof automotive vacuum pump rotor," which enhances the structural integrity and rigidity of the vacuum pump, thereby improving its sealing performance and maintaining high vacuum levels [1] Group 2 - The patent, with authorization announcement number CN 223293899 U, was applied for on November 2024 [1] - The design includes a vacuum pump shell cover and an integrated shaft column, which reduces deformation caused by vibration or impact, providing a stable rotation platform for the rotor [1] - Ningbo Kairui Sealing Technology Co., Ltd. was established in 2020, located in Ningbo, and primarily engages in software and information technology services, with a registered capital of 2 million RMB [1] - The company has a total of 8 patents according to data from Tianyancha [1]