Group 1 - The core viewpoint of the article indicates that Yidun Electronics (603328.SH) has limited PCB products applied in the industrial robot sector and has not yet ventured into low-orbit satellites or AI server fields [1] Group 2 - The company is currently focused on specific applications of its PCB products, primarily in areas other than low-orbit satellites and AI servers [1] - There is a clear indication that the company is not involved in emerging technology sectors such as AI and satellite communications at this time [1]