That, and HRC giving China access to secrets, getting American spies in China killed:
"The Chinese government systematically dismantled C.I.A. spying operations in the country starting in 2010, killing or imprisoning more than a dozen sources over two years and crippling intelligence gathering there for years afterward."
https://www.nytimes.com/2017/05/20/world/asia/china-cia-spies-espionage.html