I want m visa. what is the fee for single visit and what are the documents required?

A single entry M type costs Rs3900. You should submit your passport, completed application form, a recent passport photo, invitation letter from any Chinese business partner and an introduction letter that introduces your company and where you go, who invites you, the inviter's name, address and tel.

I want to submit the passport original ? Or xerox .

You need to submit the original passport.