Group 1 - Guangdong Jiayuan Technology Co., Ltd. has applied for a patent for a preparation process of ultra-thin carrier copper foil, with publication number CN120400937A and application date of May 2025 [1] - The patent aims to improve the surface quality of ultra-thin carrier copper foil by forming a dense adsorption layer that effectively suppresses uneven deposition of metal ions, significantly reducing surface roughness and enhancing smoothness [1] - The combination of the surface modifier and brightener enhances the microscopic structure control of the ultra-thin carrier copper foil, improving its integrity and uniformity, thus ensuring quality [1] Group 2 - Guangdong Jiayuan Technology Co., Ltd. was established in 2001 and is located in Meizhou, primarily engaged in the manufacturing of computers, communications, and other electronic devices [2] - The company has a registered capital of 4,262.38028 million RMB and has invested in 16 enterprises, participated in 151 bidding projects, and holds 420 patent information [2] - Additionally, the company possesses 21 trademark information and 94 administrative licenses [2]