China crops its history By Robert Marquand | Staff writer of The Christian Science Monitor HONG KONG – When Britain's Margaret Thatcher signed the 1984 agreement handing Hong Kong over to China, the man she signed it with was one of China's brightest lights, reform-minded premier Zhao Ziyang. It was a moment of great hope, with lots of pride and a sense that China, after years under the yoke of Mao Zedong, would become a forward-looking, less extreme state. Yet official photos of that signing now blur or diminish Zhao, or crop him out entirely. Zhao, who opposed the bloody...