Does that "51nb" Chinese company still make modded Thinkpads?
I bought their "51nb X62" model Thinkpad a few years back from an eBay user, though unfortunately it eventually died.
It was a motherboard replacement of the old Thinkpad X60 from many years ago. Replacing the old single core CPU with an Intel Broadwell era i5 and up to 32 gigs of memory
You could also install an M.2 SSD in it I believe. Along with USB 3 and other useful new features
I bought their "51nb X62" model Thinkpad a few years back from an eBay user, though unfortunately it eventually died.
It was a motherboard replacement of the old Thinkpad X60 from many years ago. Replacing the old single core CPU with an Intel Broadwell era i5 and up to 32 gigs of memory
You could also install an M.2 SSD in it I believe. Along with USB 3 and other useful new features