Sir I am a paksitan national holder but I am born in dubai

You can apply for an S2 type entry permit to visit your sister there. You can first prepare those documents including your passport and its copy, the application form, a passport-style photo, an invitation from a duly authorized unit, and an invitation letter from your sister-in-law, and copies of her passport and residence permit, as well as relationship certificate.
After, submit the application to the consulate general of China to apply for the S2 type.