Detectives and cadaver dogs are searching dense bushland in Sydney hoping to find Chinese woman Qi Yu who disappeared more than two weeks ago.
But Detective Superintendent Kerrie-Anne Lewis says the chances of finding the 28-year-old alive are "non-existent".
Qi Yu's parents - who flew out from China in the days after her disappearance - issued an emotional plea for information on Tuesday and handed out flyers at a news conference which read: "Looking for Missing Girl Qi Yu."
They have distributed the flyers at train stations and visited Ku-ring-gai Chase National Park, north of Sydney, where police are scouring bushland and waterways for their daughter's body.
Ms Yu was last seen by friends at a Campsie share house in the city's southwest on June 8.
Her housemate, 19-year-old Shuo Dong, was charged with her murder four days later.
Dong remains in custody with his matter listed for mention in Burwood Local Court on July 9.
Phone records suggest Ms Yu's white Toyota Corolla travelled north to the area around Mount Kuring-gai, Berowra and Cowan and then back to Campsie between 8.30pm and midnight.
The 2016 model hatchback was later found dumped at Burwood in Sydney's west.
Detectives believe Ms Yu was taken by car to the Berowra area on the night she went missing.