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http://audiomedia-sbs.akamaized.net/world-news_160802_533955.mp3
03:42
But United States human-rights investigator Ethan Gutmann says the sheer number of transplants, gathered from China's own records and sources, reveals the truth.
"This new evidence we have is actually quite explosive," Mr Gutmann tells SBS about his investigation with human rights lawyer David Matas and human rights activist David Kilgour into the number of transplants occurring in hospitals per year.
He says his team calculated 100,000 "without breaking a sweat", contrasting Chinese official figures of 10,000.
"We found this astounding and shocking."
He has testified to the US Congress.
It passed a motion of concern six weeks ago about "persistent and credible reports of systematic, state-sanctioned organ harvesting from non-consenting prisoners of conscience."
The Chinese Embassy did not reply to SBS's invitation to respond to the claims.
Mr Gutmann is visiting Sydney for the launch of the documentary Hard To Believe in which he features.
