The diplomat, Zhao Wei, who was declared “persona non grata,” had been accused of gathering information on a Canadian lawmaker critical of Beijing’s treatment of Uyghur Muslims.
The meeting was one of the highest-level engagements between American and Chinese officials since the downing of a suspected Chinese spy balloon in February.
For years, Germany seemed to tolerate even flagrant Russian operations on its soil. But a new Cold War-like chill has now made the snooping difficult to ignore.