China released a respected, but ailing labor rights campaigner from a prison work camp Sunday and immediately sent him into exile in the United States. BEIJING _ Protesting the lack of a defense lawyer, the father of a prominent dissident is to seek a delay in his son's subversion trial, scheduled to start on Thursday in the central city of Wuhan. The defendant is Qin Yongmin, 45, a democracy advocate who has spent 10 years in prison and labor camps and has recently promoted an alternative, non-Communist political party. China's government said Thursday that two prominent dissidents arrested this week are suspected of endangering national security _ the clearest sign yet Chinese leaders plan to quash a would-be opposition party.