Following this, Wu put all his energy into collecting materials on the reform-through-labor camp system and slave labor in mainland China. Under the guise of a businessman, he returned there to take photographs as evidence for his research. He has since been invited to testify at the parliaments of many European countries and the United States Congress, making him something of a media personality.
此後他全力蒐集中共勞改營及奴工資料，假扮商人回到大陸拍攝證據影片，也受邀到歐、美各國國會聽證，成為媒體關注的人物。