I'm not entirely convinced about this Chinese backdoor in the motherboards of servers. The diagrams indicate a tiny object I'm not sure is a microchip. Die size is so tiny. Where is its storage? Where are the traces proving it has DMA access? Without DMA it can't backdoor the OS or manipulate the NICs to send traffic.
Smells like some right wing conspiracy bullshit to help Trump's agenda of making China an enemy and empower his tariffs.