A housemate accused of murdering a 28-year-old Chinese woman who vanished from her Sydney home more than four days ago will remain behind bars.
Shuo Dong, 19, is accused of murdering Qi Yu but detectives are yet to find her body.
Dong did not appear in Burwood Local Court on Wednesday and bail was formally refused by magistrate Mark Richardson.
Dong's lawyer Matt Kwan told the court his client had not consented to the prosecution's application for forensic procedures, which could include the collection of DNA evidence.
NSW Police arrested Dong upon his release from hospital on Tuesday and charged him with murder.
Ms Yu was last seen by friends at her Campsie share house in the city's southwest on Friday evening and had made contact with her family in China about 7.15pm that day.
She was reported missing on Saturday and police found her white Toyota Corolla in Burwood, four kilometres away.
Detectives remain in the area questioning neighbours in the hope they will uncover the 28-year-old's body.
Retired school teacher and neighbour Rhonda Hall, said about five people shared the three-bedroom townhouse, and although she had never seen Ms Yu or Dong together, both were friendly.
"He spoke very nicely to me," she told reporters in Campsie.
"There was no trouble there at all, that's why we were all shocked."
The 72-year-old, who described the incident as "very frightening," said she heard screaming from the home on Saturday.
"We heard 'her car is gone, her car is gone' ... then the next minute we were crowded by police and had the helicopters going over," she said.
Ms Yu's mother has travelled to Sydney and visited the Campsie house, according to a neighbour.
"She cried and cried," Vincent Chen told The Daily Telegraph.
He described the missing woman as "very honest and quiet".
Dong's case is next scheduled for mention in Burwood Local Court on July 9.