Zhou arrested as part of corruption probe , expelled from Communist Party . Zhou previously was a member of the ruling Communist Party 's Politburo Standing Committee . Political activists and observers now note the similarity between the Bo and Zhou cases . He 's the highest - ranking official to get caught up in President Xi ##lai 's anti - corruption campaign . Zhou was also a patron of Bo Xilai , a former a fast - rising political figure who was arrested for corruption .
Zhou arrested as part of corruption probe , expelled from Communist Party . Zhou previously was a member of the ruling Communist Party 's Politburo Standing Committee . He 's the highest - ranking official to get caught up in President Xi ##lai 's anti - corruption campaign . Zhou was also a patron of Bo Xilai , a former a fast - rising political figure who was arrested for corruption .