'The Shadow War': How a Chinese spy stole some of the Pentagon's most sensitive secrets - CNN Politics:

To his American friends and contacts, Stephen Su was an affable businessman and gregarious guy. "People liked him," Bob Anderson, the FBI's former head of counterintelligence, told me. "They didn't think he was an asshole and I know that sounds stupid, but people are people and that's how it started."...
https://www.cnn.com/2019/05/14/politics/shadow-war-chinese-spy/index.html