The federal government and human rights groups said they are concerned about the deteriorating health of Australian blogger Yang Hengjun, three years after he was detained in China, and with a Beijing court yet to deliver a verdict in an espionage trial heard in secrecy eight months ago.
An Australian citizen born in China, Dr Yang wrote about Chinese democracy and US politics online as a high-profile blogger and also penned a series of spy novels.
Immediately before he was detained at Guangzhou airport, three years ago on Wednesday, he had been living in New York, where he was a visiting fellow at Columbia University. He has denied working as a spy for Australia or the United States.
China's foreign ministry has previously said "judicial authorities handled the case in strict accordance with the law, (and) fully protected Yang Hengjun's litigation rights".
Diplomatic ties between Australia and China have deteriorated sharply since 2019, when Dr Yang was arrested, with China imposing trade sanctions on some imports from Australia and reacting angrily to its call for an international inquiry into the origins of the coronavirus.
In messages to friends and family dictated from prison, Dr Yang said he shifted between pessimism and optimism, and he wanted the Chinese government to publish details of his case openly.
"When I was outside, one of my objectives was to advocate for rule of law. I didn't believe that I would end up becoming a victim of rule by power," he wrote in a message that was circulated by friends and viewed by Reuters.
Australian diplomats were refused access to Beijing's No.2 Intermediate People's Court last May where Dr Yang was tried on unspecified espionage charges, because China said the case involved state secrets.
China's courts have a conviction rate of well over 99 per cent, and public and media access to sensitive trials is typically limited.
Numerous delays
Australia's foreign minister, Marise Payne, called for Yang Hengjun's release and said he has had no access to his family and only limited and delayed access to lawyers since he was detained by Chinese authorities three years ago.
"We are very concerned that the verdict from this trial has been subject to numerous delays," she said in a statement on Tuesday.
"Neither Dr Yang nor the Australian government have been provided with details as to the charges against him or the investigation, reinforcing our view that this constitutes the arbitrary detention of an Australian citizen."
Australia was "extremely concerned about Dr Yang's health", she added, and called on Chinese authorities to meet obligations to provide treatment.
Chinese-Australian writer Yang Hengjun. Source: AAP
The Australia director of Human Rights Watch, Elaine Pearson, said conditions in China's detention facilities were poor.
"We are very concerned that (Dr) Yang's detention has exacerbated his medical problems and that the treatment in prison is inadequate," she said.
Dr Yang's friends told Reuters his worsening health problems included gout, dizzy spells, inability to walk at times, high blood pressure and blood tests that showed he was at risk of kidney failure.
Any hope for him to be released for medical treatment cannot occur until he is sentenced, which has been delayed until April, his supporters said.
University of Technology, Sydney professor Chongyi Feng, the 56-year-old's former teacher, told Reuters Dr Yang had said in a message he had "committed no crime, let alone espionage".
