That’s what I said above - and the flaws did not come from China. They came from the CDC designing not so great PCR primers, whereas the ones designed in Europe work great.
Here’s an in-depth article from MIT’s Technology Review magazine that discusses how the CDC screwed up. The article is nice enough to say that designing a good PCR primer is an art, not an exact science, and if you don’t have a good primer, you will get a false positive because it will prime other stuff besides the viral nucleic acid. But no article cited mentions China. The failure is Made in America and testing was quickly halted with the faulty kits. So the faulty kits delayed starting good testing in the U.S. and now that the well-meaning FDA ruling created in 2004 has been put aside (the White House has had since January to reconsider that rule), labs with adequate authority and credentials are free to come up with their own tests and get very rapid CDC/FDA approval (can’t remember which) so testing at long last is really going to get ramped up in the U.S. And there are not lots of false positives in China because guess what -they weren’t using the faulty made-in-the-U.S.A. CDC kits. And the issue has nothing to do with previous administrations but the current one is trying to pretend it does. All hands (and neurons) were not on deck when the starting gun sounded in January - hopefully, the issue is getting the full attention and seriousness it deserves now.