The common goal seems to be to get their foot in the door within a subset of 3-5 American financial verticals (the "b-b-but I just work in marketing!" excuse as an obscenely common insider position that doesn't attract any scrutiny at all, unlike someone working in engineering or R&D. Seriously-- you want to find the spies in your company? Start with marketing), exfiltrate everything they can access and retreat to China for a cushy job and enjoyment of immunity against extradition. By the time the target catches on and law enforcement gets spun up, they've already finished their tour of duty with two to three other companies and are on a plane halfway across the Pacific.
It's hard to do anything about it without either implementing literal racist policies or comprehensively overhauling an entire industry's security posture, but it is what it is.