unknown board

[xaba55]

Please help.
We bought a board on AliExpress, but no one provided any documentation. And I can't ask the seller for it.
Can anyone share any information? It's very difficult to figure out which pin goes where without documentation on the circuit diagrams.

But given my situation, I set up two Ethernet interfaces. I haven't tested them at full capacity, but I can ping from both networks...

myd lt527m 16e2d 180 e sx

Thanks a lot.

Edited 4 hours ago by xaba55
дополнение

[Werner]

moved. Has nothing to do with opi4a. 

Remove heatsink to get an idea which SoC hides beneath