He was detained when trying to board a domestic flight , and held incommunicado by the Chinese in violation of their own and international law .
Yang returned to China in April 2002 on a friend 's passport to view labor unrest in northeast China .
Yang was detained when trying to board a domestic flight , and held incommunicado by the China in violation of their own and international law .
Yang returned to China in April 2002 on a friend 's passport to view labor unrest in northeast China .