PNET = Native English Teacher teaching in Primary Schools
I bet there're some places available in international schools, which you may wish to concentrate on, coz most of the HK schools requrie teachers to be able to teach in Chinese.. but yeah, even you're a Science teacher now, maybe you can think of change to teacher HK kids English!
Good luck and keep an eye on job ad, there should be more and more ads coming in the coming weeks!!
Cheers, Blom