Jintao Liu's body shuddered in pain as he endured yet another day of extreme torture. He had woken to pins being pushed into his nails before he was forced to stand still in a yard for some 18 hours. During a lengthy stint in a series of Beijing detention centres and labour camps between 2006 and 2009 ... he was subjected to electric shocks, medical tests, forced feedings, beatings, violent sexual assaults and other barbaric forms of torture designed by prison guards to humiliate and inflict maximum pain. Mr Liu, 36, is one of thousands of people who have been incarcerated in some of China's worst jails, labour camps and detention centres for practising Falun Gong. Doctors Against Forced Organ Harvesting (DAFOH) Australia spokeswoman Sophia Bryskine said the persecution of Falun Gong practitioners was still extensive with many being locked up with no legal proceedings". Since the Chinese government outlawed Falun Gong [in 1999], it has detained thousands - most likely hundreds of thousands - of practitioners, according to a 2008 report by the Congressional Commission on China. In 2006 the United Nations' Special Rapporteur on Torture, Manfred Novak, concluded that 66 per cent of all prisoners in China were Falun Gong practitioners. Mr Lin said he witnessed many other political prisoners being tortured and humiliated during his stint behind bars. Some prisoners were tortured to death, he said.