Yang Hengjun has been detained since January,2019.Credit:AP
Chinese authorities have blamed the coronavirus for the suspension of the visits. Prior to that,Dr Yang was allowed a monthly half-hour visit from a representative from the Australian consulate.
A template letter Amnesty International is distributing to members around the world to then send to Chinese authorities says it is worried Dr Yang was not receiving proper medical care.
"Suffering from memory loss,dizziness,blood pressure related issues and several other serious health conditions,it is crucial that he get immediate and proper care,"the letter reads.
"Because Yang is currently being held incommunicado without access to consular visits,lawyer of his choice or his family,I am gravely concerned for his wellbeing and fear that he is at risk of torture and other ill-treatment."
According to sources with knowledge of the situation,there is growing concern Dr Yang has been subject to sleep deprivation and around-the-clock interrogations.
Dr Yang is being detained at Beijing State Security Bureau Detention Centre,where his last consular visit was December 30 last year.
The heightened concerns about Dr Yang come after Australian manKarm Gillespie was last week sentenced to death for having 7.5kg of methamphetamines in his luggage.