1. Zhang was an innocent with an imperfect grasp of her security responsibilities, and an over-developed curiousity about work that wasn’t her business.
Security mindedness does not always come naturally to people.
2. Zhang was a “Walter Mitty.” A person attracted to the allure of espionage and pretending to be a spy
3. Zhang was an apprentice spy in the making. Groomed by a foreign power to seek out job opportunities that might offer access to valuable intelligence.
4. Zhang was a penetration agent. Established in the espionage business (though remarkably restless)
5. Zhang was a false-flag recruitment. Meaning: she was approached by a foreign power asking for her assistance, perhaps in the beginning with a few innocent-seeming requests, but that foreign power was not who it pretended to be and had a longer-term game plan for Ms. Zhang. (OK, if you need a clue, think Russia pretending to be, say, the PRC) ...