what visa M OR F

Hi
My name is jay from adelaide. I am an indian holding indian passport but permanent resident of australia. Well, I am having sunglasses retail sales business. I want to personally visit china for getting direct sellers and also I want to meet guys manufacturing kiosks in shenzan city. So k8ndly let me know:
1. What type should I apply for f or m?
2. What needs to be done in terms of docs?
3. Should I apply through an agent or easy to apply online and
4. How long would it take to get it as I am planning to.visit in august 2014.
Kindly help me by mailing me on my email: universaljaygmail.com.
Thanks
Regards
Jay