What this means
The IEEE assigned the MA-L block 7CA85D to RONGCHEENG GOER TECHNOLOGY CO.,LTD.. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting 7C:A8:5D, it is RONGCHEENG GOER TECHNOLOGY CO.,LTD. hardware.