Missing Person Squad detectives are investigating the disappearance of missing Epping woman Ju Zhang.
Detectives are appealing for public assistance to help locate Doncaster man Joon Seong Tan who may be able to assist with their investigation.
Ju was last seen at her home on Winchester Avenue about 5.30pm on Monday, 1 February.
At the time the 33-year-old mother was wearing a pink pyjama top and shorts, and no shoes.
Ju did not have any personal belongings with her at the time except her mobile phone.
She was reported missing to police the following evening.
Her disappearance is considered to be extremely out of character and police have strong concerns for her welfare.


Joon Tan, 34, may be travelling in his black 2008 Mazda CX9 station wagon, with registration WKE 850.
Tan may have travelled interstate.
Police are appealing for anyone who sights Ju or Tan to call triple zero (000) immediately.
Anyone with information about Ju's disappearance or Tan's location is urged to contact Crime Stoppers on 1800 333 000.