VISA for working: Documents needed

Hello
I am Italian with Italian Passport, my residence is in Germany, now i work in Shanghai in the Chinese Branch of a German company with temporary residential permit.
I have used all the Entries of my current Visa so i must issue a new one.
Since i will be in Rome next week i would like to isuue the new Visa for working (business trip) at the CVASC in Rome.
Questions:
1) is the CVASC the right office also for VISA for working?
2) I have prepared the following documents:
- Form V2011.A duly filled
- Two Pass Photos
- Invitation Letter of the Chinese Company
(- Passport)
Do you need some other documents to issue the Visa ?