Core Viewpoint - Chongda Technology (002815.SZ) supplies communication backplane PCB products to Amphenol, which are applicable in the data communication field [1] Company Summary - Chongda Technology is engaged in providing communication backplane PCB products [1] - Amphenol is identified as a key customer for Chongda Technology [1] Industry Summary - The communication backplane PCB products are utilized in the data communication sector, indicating a focus on technological applications within the industry [1]