http://www.scamalert.sg/scams/alipay-scam.html
Description of the scam here quite accurate.
Sometimes I just make an appt with the girl at a 'designated' place and wait for them to call me via wechat. If the scammer acts well enough her voice might be like a syt then just bullshit with her. Say your phone camera spoil (or take a photo on google of the place). Then tell her a lot of ppl queuing at AXS machine to pay their bills. Just try and initiate phonesex with her while 'waiting' haha.
All in all, 99% of the time wechat escorts are scams. So please. if its too good to be true, it is.