Gutmann's writing on China includes two books,
Losing the New China: A Story of American Commerce, Desire and Betrayal and ''The Slaughter: Mass Killings, Organ Harvesting, and China's Secret Solution to Its Dissident Problem''. Gutmann has testified before the U.S. Congress, the European Parliament, and the United Nations. and is a China Studies research fellow at the Victims of Communism Memorial Foundation. In 2014, the federal district court in San Jose dismissed the case, saying the plaintiffs failed to prove that Cisco was aware of its products being used for oppression.
Organ harvesting in China From 2006, Gutmann wrote articles about organ harvesting. In 2012,
"State Organs: Transplant Abuse in China", was published with essays from six medical professionals,
David Matas and Gutmann. Gutmann wrote that he interviewed over 100 witnesses including Falun Gong survivors, doctors, policemen, and camp administrators. and that between 450,000 and 1 million Falun Gong practitioners were detained at any given time. Gutmann told the
Toronto Star in 2014 that in total "the number of casualties is close to 100,000". In August 2014, Gutmann wrote ''The Slaughter: Mass Killings, Organ Harvesting, and China's Secret Solution to Its Dissident Problem'', The 700-page report contained information on transplant statistics sourced to Chinese hospitals' publications and other Chinese primary sources. Gutmann has said that China is organ harvesting from
Uyghurs in its prison camps in the
Xinjiang region. In November 2020, Gutmann told
Radio Free Asia that a hospital in Aksu, China, allowing local officials to streamline the organ harvesting process and provide a steady stream of harvested organs from
Uyghurs. The estimate was used by Congressman Chris Smith in support of the Stop Forced Organ Harvesting Act of 2023. ==Controversies in Taiwan==