It is a suspended sentence that can be converted to a life sentence after two years, pending good behaviour.
The Australian citizen, writer and democracy activist has been imprisoned in China since 2019 on charges of spying, which he has always denied.
The Australian government has petitioned for his release.
Senator Wong has called the court’s decision “harrowing” and “appalling” and summoned China’s ambassador for an explanation.
She added Dr Yang had further appeal avenues available and the government would continue to advocate on his behalf.
Australian officials were unable to attend Dr Yang’s closed trial in 2021.
“We have consistently called for basic standards of justice, procedural fairness and humane treatment for Dr Yang, in accordance with international norms and China’s legal obligations,” Senator Wong said.
“All Australians want to see Dr Yang reunited with his family. We will not relent in our advocacy.”
Family ‘devastated’
In a statement, a supporter of Dr Yang said his family was “shocked and devastated by this news, which comes at the extreme end of worst expectations. They will take time to process”.
There have been ongoing concerns about Dr Yang’s health. The 58-year-old has a large cyst on one of his kidneys.
Last year Dr Yang’s family wrote to Prime Minister Anthony Albanese warning his health was rapidly declining and pleading with Mr Albanese to do “all in his power” to secure his release during his visit to China.
China’s decision to release former state TV anchor Cheng Lei also briefly stoked optimism among some of Dr Yang’s supporters that Beijing might be willing to show him some clemency.
“We have been inspired by the wonderful news of Cheng Lei’s release and return to Melbourne,” Dr Yang’s family wrote.
“We hope that you, Foreign Minister Penny Wong and Ambassador Graham Fletcher can achieve a second miracle by saving our father.”
But one Australian government source said Dr Yang’s case was “very different” to that of Cheng Lei’s, although they did not provide any further detail.
‘Morally indefensible’
Feng Chongyi, who was Dr Yang’s PhD supervisor in Australia, told ABC’s Afternoon Briefing the Australian government should apply for medical parole on humanitarian grounds.
“This is an extraordinary case. We should take extraordinary measures to deal with it,” Professor Feng said.
He accused the government of taking a “business as usual” approach to the case to help “normalise the trade relationship”.
“That’s not acceptable,” he said.
“It’s a morally indefensible position for Australia to put commercial interest before the dignity, basic human rights and life of an Australian citizen.”
Daniela Gavshon, the Australia director at Human Rights Watch, said diplomatic efforts had not been enough.
“It is an outrageous outcome for Dr Yang and his supporters,” Ms Gavshon said.
“It follows years of arbitrary detention and a closed trial and it is not evidence of any wrongdoing but really of Beijing’s corrupt and opaque criminal justice system. That someone can be sentenced to death on such scant information is deeply worrying.”abcnews