is a bit of a stretch, given the reporting, intel briefings, comments from members of congress after the briefings, etc...
Of course China always denies this, but the evidence for this behavior over thousands of cases is such that the burden of proof is on those who claim such a person was not a spy.
This does not imply that the Chinese people or even its government are "evil" or that we shouldn't do business with them. It's just something that everybody who deals with China needs to be aware of.
yet it was an open secret among those in the know, both the affairs and the export violations