China | Eyes everywhereAmerica is on the hunt for these non-traditional agents. But its efforts risk backfiringIllustration: Ben JonesAMONG EXILED Chinese dissidents, Tang Yuanjun was well known. He had participated in the Tiananmen Square protests of 1989 and landed in prison as a result. He later defected to Taiwan, swimming to one of its outlying islands from a fishing boat. America granted him asylum and he settled in New York, becoming the leader of Chinese pro-democracy groups. But in Augu...