Mr.shah jehan, there is no Chinese consulate in peshawar, you can only apply for visa in Islamabad or Karachi.
You should submit:
(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) Certificate of the relationship between you and the person in China you want to visit (original and photocopy)
(IV) Invitation letter from your friend you want to visit
(V) ID card copy or passport copy of your inviter
(VI) Copy of Chinese visa page of your inviter's passport