Thank you for your informative and interesting reply. It seems that we essentially agree, although most teachers do not stop off at Hong Kong, to have the opportunity of buying a mobile-but i suppose you mean if you do border runs to acquire Z visas? Meself I prefer to work on F and L visas, which is just as well because I lost the degree I had a few years ago, so I don't think they would allow me a Z.

Just one small point, QQ only do a Windows version, surely?