Pls clarify

I am writing on behalf of my co. We are a private organization in CMB,SL and want to send one of our top level managers to attend a conference in Shanghai, China. This is going to be his first visit to China. The organizing party of the conference has already sent us a common invitation.
1.Pls confirm whether we need to get a separate invitation to his name personally. 2.What will be the other documents we have to produce to apply visa...
3.Can we use the downloaded visa application

Thank you.
LG