Wu studied at the Geology Institute in Beijing, where he was first arrested in 1956 for criticizing the Communist Party during the brief period of liberalization in China known as the Hundred Flowers Campaign. He has also claimed that he protested the Soviet invasion of Hungary in 1956. In 1960 he was sent to the laogai ("re-education through labor"), the Chinese labor camp system, as "counterrevolutionary rightist." He was imprisoned for 19 years in 12 different camps mining coal, building roads, clearing land, and planting and harvesting crops. According to his own accounts, he was beaten, tortured and nearly starved to death, and witnessed the deaths of many other prisoners from brutality, starvation, and suicide.
Released in 1979 in the liberalization which followed the death of Mao Zedong, Wu left China and went to the United States, where he became a visiting professor of geology at the University of California, Berkeley. There he began writing about his experiences in China. In 1992 he resigned his academic post and became a human rights activist. He established the Laogai Research Foundation, a non-profit research and public education organization which was financed by the AFL-CIO and in fact was based there in the early years. The work of the foundation is recognized as a leading source of information on China's labor camps, and was instrumental in proving that organs of executed criminals were used for organ transplants..
In 1995 Wu, by then a U.S. citizen, was arrested as he tried to enter China with valid, legal documentation. He was held by the Chinese government for 66 days before he was convicted in a show trial for "stealing state secrets." He was sentenced to 15 years in prison, but was instead immediately deported from China. He attributes his release to an international campaign launched on his behalf.
He was awarded the Courage of Conscience Award by the Peace Abbey in Sherborn, MA on September 14th, 1995 for his extraordinary sacrifices and commitment to exposing human rights violations in his motherland China.
Wu is currently the Executive Director of the Laogai Research Foundation and the China Information Center. Both organizations are located in the Washington, DC area and are funded principally by the bi-partisan National Endowment for Democracy. He is also a member of the International Council of the New York-based Human Rights Foundation.
Wu also wrote a response to Simon Wiesenthal's book The Sunflower. Wu briefly recounts his story while imprisoned, and responds to the question posed at the end of The Sunflower.