Indiscriminate targeting. It's clarified at the end of that paragraph, and was part of the article's lead-in:

   "There's a thought among the public that if you don't work in a sensitive area that the PRC might be interested in for its traditional espionage activities, then you are safe, they will not target you," [deputy assistant director for the FBI's cyber division] said, during a Thursday interview with The Register. "As we have seen from Salt Typhoon, this is no longer an assumption that anyone can afford to make."