Dear Sir,
Thanks for your reply and advice. But right now I am not working in our China factory. but I need to go to follow up the some work and stay one or two months in a year. pls advice on this case what kind of visa i need to apply.
this time I applied for F visa and I didn't ask for Z visa. and I submit the F visa invitation letter.
pls advice me what documents I need to submit to get the F visa?

b'rgds
ujjal