Mr.Muhammad Masood, you can have a try to apply for toursit visa (L visa) in this way, submit the below documents to Chinese embassy in Islamadad or Consulate of China in Karachi according to consular districts.

(I) Original passport with validity more than six months and minimum 2 blank visa pages;

(II) Photocopy of the first 2 pages (personal information) of the passport and the recent Chinese visa page if there is any;

(II) One fully completed visa application form in Chinese or English, attached with one of the applicant's recent color photograph (30mm X 40mm)

(III) round-trip flight ticket, hotel reservation

(IV)Copy of your Pakistani visa

(v) covering letter from your company stating your salary monthly, yearly.