I am a Pakistani national, living in Dubai and want to go China for a vacation.

Mahmood, you can try to apply for a tourist L type to PRC for a visit. You should first prepare the relevant materials: your passport and its photocopy, the application form, a passport-style photo, round trip air tickets and hotel reservation, your residence permit in Dubai, and an invitation letter from Chinese tourism bureau.
And then submit the application to the consulate general of PRC to apply for it.