What documents are required for F visa application?

Yes, the Visa application form and your passport along with the invitation letter from the company are sufficient for F visa application.

If you have not been to mainland China, you should provide copies of photo page of your current passport as well as other ID, e.g. previous passport, driver license, etc

If you have been granted Chinese visa(s) before, copies of recent Chinese visa with entry record is required. If they are not on the current passport, copies of the previous passport with the above data are required.