What this means
The IEEE assigned the MA-L block 20EAC7 to SHENZHEN RIOPINE ELECTRONICS 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 20:EA:C7, it is SHENZHEN RIOPINE ELECTRONICS CO., LTD hardware.