For China Business Visa application, you must have Visa Notifications Form from an authorized Chinese Unit and an invitation letters from the host company, otherwise, you can't get a China Business Visa, I advise you to apply for a tourist visa to China, then make business investment, once you do the investment, the local government will help you to prepare documents to apply for China Business visa.

Hello,
IF you want to apply for a f visa for business, we can send you a business invitation letter,Then you can take your passport, white photo,visa form to apply for a F visa,
Or you can apply for a L visa at first, Then come to China, we can help you do the visa extension and Conversion.
More questions, you can send me email. I will reply you as soon as possible.