The group says people who practice the spiritual discipline of Falun Gong are being persecuted by the Chinese communist government, and that prisoners have been killed in order to traffic their organs.

Falun Gong, also known as Falun Dafa, is the practice of meditation and exercises with teachings based on the universal principles of “truthfulness, compassion, and tolerance”.

But the practitioners say the Chinese government opposes Falun Gong and has imprisoned hundreds of thousands of followers since 1999.

The group says a report by independent investigators conducted a detailed analysis of more than 700 hospitals in China, and found the transplant volumes in China are far greater than reported by official numbers, and that non-consenting prisoners of conscience remain to be the primary source of unethical organ procurement.

The US House of Representatives passed a resolution in June to “express concern regarding persistent and credible reports of systematic, state-sanctioned organ harvesting from non-consenting prisoners of conscience in the People's Republic of China”.

The SOS Car Tour – which stopped in Cessnock on September 22 – includes former prisoners who say they have experienced the persecution, blood testing and physical examination in detention.

Samuel Liu, Apple Ling and Kerry Chen were among those who visited Cessnock.

All three say they were physically and mentally tortured in Chinese prisons.

Mr Liu moved to Australia in January 2016 to enjoy practising Falun Gong “free of fear”.

Ms Ling came to Australian in 2010, while Ms Chen fled to New Zealand in 2003 and moved to Australia two years ago.

The SOS Car Tour is calling on the Australian Government to support its cause.

"We realise that most Australians know little about Falun Gong and the tragic situation in China,” Falun Dafa Association president Dr Lucy Zhao said.

“We hope that the car tour, which will drive through over 200 cities, will help fellow-Australians know more about what is going on.”