What this means
The IEEE assigned the MA-L block E86E3E to Sichuan Tianyi Comheart Telecom 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 E8:6E:3E, it is Sichuan Tianyi Comheart Telecom Co.,LTD hardware.