Four rights defense lawyers, Jiang Tianyong ( 江天勇 ), Tang Jitian ( 唐吉田 ), Wang Cheng ( 王成 ) , and Zhang Junjie ( 张俊杰 ) , as well as an unknown number of citizens were detained by police authorities in Jiansanjiang, Heilongjiang Province (黑龙江省建三江) one day after they visited a "legal education base"...