Hi Robert,, thanks for your message, as a agency, this is my job to make sure the teachers i have been recruitment, when they work in China, they have a illegal visa, also its my job to make sure school will pay on time, and not cheat teachers, there are lots school here in China are not very honesty, thats why, most of schools i have been contact with are public schools, cause i know, if there anything wrong, i know where to complain, so..if a school offer a F visa, and they dont want offer a work visa, its only because they dont have the licence to hire foreigners, i think i am very care about visa, maybe because i was a foreigner students over in American, and that was the time, i learned,a right visa is very importan for a foreigner to live and work at oversea.