【明報專訊】AT his last press conference to answer questions by Chinese and overseas reporters in the capacity of China's premier, Wen Jiabao pointed out categorically that political structural reform is needed, or "historical tragedies like the Cultural Revolution may happen again". Understanding China as well as he does, Wen can't possibly have made such a remark without some concrete justification. Unhappily, he also pointed out that there are formidable barriers to reform. Whither China?