Can I still apply for patent paper documents?

What do you mean by your third inventor? Are there two inventors in front? It has no effect on paper applications or electronic applications.

Paper applications and electronic applications do not need inventors, that is, they are handled by themselves or submitted by agents.

If it is an individual application, an electronic application is required. You must register the information of electronic application before you can apply. If it is a paper, you can send it directly to Beijing or find a local patent agency.