im an iranian resdint in the UAE duabi under student visa

You may just apply for a China visit visa from the Consulate-General of the People's Republic of China in Dubai with the following documents:
1. Original passport with blank visa pages and validity of more than 6 months;
2. UAE resident visa valid for more than 6 months. (Excluding non-GCC applicants);
3. Application Form which must be completed neatly and signed by the applicant;
4. One passport photo
5. Copies of the data pages of the applicant's passport and UAE resident visa.
6. financial proof of adequate funds for your trip in China
7. Round-trip air tickets.
It takes around 4 working days. It costs 110 Dirhams.