Group 1 - Xiaomi Auto Technology Co., Ltd. and its subsidiaries have applied for a patent related to "sound wave control methods, devices, systems, and vehicles," indicating a focus on enhancing user experience through customizable sound features in vehicles [1] - The patent aims to allow users to configure sound sources according to their preferences and dynamically modulate audio signals based on driving parameters, enhancing driving enjoyment [1] - The patent application was filed on April 2025, with the publication number CN120287975A, showcasing Xiaomi's ongoing innovation in the automotive sector [1] Group 2 - Xiaomi Auto Technology Co., Ltd. was established in 2021 with a registered capital of 1 billion RMB and has engaged in various investment and patent activities [2] - Xiaomi Technology (Wuhan) Co., Ltd., founded in 2017, has a registered capital of 210 million RMB and has invested in five companies, indicating a strong presence in the technology service sector [2] - Beijing Xiaomi Mobile Software Co., Ltd., established in 2012, has a registered capital of 1.488 billion RMB and is heavily involved in internet services, with a significant number of patents and bidding projects [2][3] - Beijing Xiaomi Songguo Electronics Co., Ltd., founded in 2014, has a registered capital of 250 million RMB and focuses on retail, holding numerous patents and trademarks [3]