The woman, Pornthip Sathienjarukarn, 49, came to Hong Kong as a tourist on January 21. She was due to fly home on February 4, but was last seen outside Mui Wo market on the morning of February 9.
After initial inquiries the police believe the case is not suspicious and have handed the case to Missing Persons Unit.
Ms Sathienjarukarn, who is reportedly in an emotionally fragile condition, is about 1.6 metres tall and of medium build. She has a square face with yellow complexion, short black hair and a red birthmark on her chin. She was last seen wearing a beige windbreaker and a pair of slippers.
Anyone who knows the whereabouts of the missing woman or may have seen her is urged to contact the Regional Crime Unit of New Territories South on 3661 1223 or 6277 5336 or email to firstname.lastname@example.org, or contact any police station.
UPDATE FEB 21, 1PM: Lantau police advise Ms Sathienjarukarn is still missing. They are still searching for her on South Lantau but have no reason to believe she is still here. The case is now in the hands of Regional Crime Unit.