That only applies to selected Chinese companies being blacklisted rather than all Chinese companies.
Otherwise it would no longer be be practical to have any modern technology made in China - by either Chinese or American companies.
- What has changed though, is that China has agreed to prevent (discourage?) Chinese companies from forcing technology transfers in manufacturing deals. Previously it was more or less of a requirement that a joint-venture be created wherein ownership of the IP would be shared with the Chinese company that would manufacture the product. This was characterised by some as 'IP theft' and by others as merely a 'sharp' business practice.
I had no idea that Rambus still existed... I kind of assumed after RDRAM fell to the wayside, and "we tried to sneak our patented technology into open standards" attempts became their business model, that they'd fallen apart.