I mean, the subject of “Chinese Espionage in the United States” has a fairly lengthy page all of its own on Wikipedia with examples and concerns. https://en.m.wikipedia.org/wiki/Chinese_espionage_in_the_United_States

Probably one of the most notable examples:

Between 2010 and 2012, intelligence breaches led to Chinese authorities dismantling CIA intelligence networks in the country, killing and arresting a large number of CIA assets within China.[43] A joint CIA/FBI counterintelligence operation, codenamed "Honey Bear", was unable to definitively determine the source of the compromises, though theories include the existence of a mole, cyber-espionage, compromise of Hillary Clinton's illicit classified email server as noted by the intelligence community inspector general,[44] or poor tradecraft.[43]Mark Kelton, then the deputy director of the National Clandestine Service for Counterintelligence, was initially skeptical that a mole was to blame.[43]

In January 2018, a former CIA officer named Jerry Chun Shing Lee[note 1] was arrested at John F. Kennedy International Airport, on suspicion of helping dismantle the CIA's network of informants in China.[47][48]

And that’s just one we all know about. Not to mention a rich history of Chinese state-sponsored corporate espionage and a history of let’s say playing fast and loose with international norms, human rights, etc.