tourist visa requirements, do I have everything required?

My name is franklyn,
I work with a bank here in Nigeria. Please I will need your clarification on issue of requirements for a Chinese L type. I don't an invitation letter but I heard a hotel reservation for my period of stay with my flight reservation to and fro can suffice for that.please I need to confirm this before I make my application. Please I want to give you a run down of the documents with me now,so you help assess to know if there are still other documents I will need to present to the embassy.

The documents in my possession:
Introduction letter from my employer(identifying me and stating the purpose of my trip)
My official identity card.
My six months payslips
my six months statement of account.
my international passport with six months validity
A copy of my itinerary showing my hotel reservation and flight tickets with return tickets as well.
my application form with a recent passport photo affixed to it.

Please apart from these documents mentioned are there other documents the embassy will want me to present for a L type to PRC.

Thanks.