Requirements for Visa:

Original Passport ( valid for minimum 6 months from the date of travel )
UAE residence visa ( valid for minimum 3 months )
2 (two) Passport size Picture (white background)
Letter from the Employer mentioning the Salary and position with company stamp.
If Self Employed Trade license is required and self-introduction letter in company letterhead with a stamp.
Invitation letter from china ( Business Purpose)
Trade license copy.
Visa valid for 3 months single entry.
Additional requirements -
For some nationality like – (Pakistan, Bangladesh, Lebanon, Morocco, Syrian, Iranian)
Required invitation from Chinese company approved by the Government (with barcode).
Normal invitation letter from the Chinese company and ID copy of invitee