Group 1 - The company Zhu Cheng Technology (301280.SZ) has a subsidiary, Deweijia, that focuses on the research and manufacturing of high-frequency and high-speed connectors [1] - The main products include four types of high-frequency and high-speed connectors: Fakra, HFM, HSD, and H-MTD [1] - These connectors are primarily used in intelligent driving systems, smart cockpit systems, and in-vehicle infotainment systems [1] Group 2 - The downstream customers include major automotive manufacturers such as Chery, Changan, SAIC, Audi, and Xiaopeng [1]