The fentanyl pipeline is what came to my mind as well; another thing exported from China to the US to disastrous effect on the well-being of many Americans.

To be fair, trying to consider the other way around, I wonder what Chinese people could point to as disastrous stuff (in terms of the well-being of their population) coming from the US.

What about America's role in the fentanyl issue? It's available all over Europe as well, but people still decide against it and so far it stays a very small mostly regional niche issue.