Rui Chenggang is well known for his provocative interviews with corporate and world business leaders for CCTV — the state-run Chinese Central Television. But last week, just before going on air, he was taken away by the authorities.Rui Chenggang is well known for his provocative interviews with corporate and world business leaders for CCTV — the state-run Chinese Central Television. But last week, just before going on air, he was taken away by the authorities.