WITHIN minutes of arriving at Sydney airport on September 6 last year, Chinese tourists Jenny and Susan had vanished.
 
The two friends had flown in from Auckland, cleared Customs with the rest of their tour group, grabbed their bags and just disappeared.
...
 
Sergeant Stewart said there was no sign the women had been trafficked for sex slavery using the usual methods previously seen in Australia.
 
...
Sex industry sources say professional traffickers have changed their modus operandi to avoid Australia's anti-trafficking laws.
 
They pay the woman's airfare and expenses, but she is free to do as she likes as long she repays the agreed amount.
 
If not, pressure is exerted on the woman's family in her home country.
 
 The Australian, 31 January 2009