You should apply for an L visa at the Chinese Consulate in Dubai.
Documents required:
1. A completed visa application form
2. Original passport, which must be valid for more than 6 months and has more than two blank visa page left, and a passport copy (A-4 size).
3. A copy (A-4 size) of the U.A.E. residence visa, which should be valid for more than 6 months, if non-U.A.E. national.
4. A photograph as in the passport.
5. A signed and stamped employment/no-objection letter from the company which clarifies the applicant's full name, nationality, passport number, position,salary, the purpose of the visit etc. Or a copy of the trade license, if self-employed.
6. A copy of the round air ticket booked, hotel reservation, an invitation letter and personal bank statement, if required by the consular officers.