If go to China for business, you need a F business visa and you need the following requirements to apply for the visa from the Chinese embassy in Pakistan.
a Original Visa Notice Sheet from an authorized governmental apparatus /organization of China prescribing the visa validity, number of entries and stay period;
b Fully completed Visa Application Form in Chinese or English, attached with one of the applicant's recent color photograph (30mm X 40mm)
c Original passport with validity more than six months and minimum 2 blank visa pages;
d Photocopy of the first 2 pages (personal information) of the passport;
e Invitation letter from the company/organization/institution you want to visit inChina;
Since this is your first visit to China, it is recommended that following documents are also prepared in case of necessity:
a Your income certificate/up-to-date Personal Bank Statement
b Your company's Registration Certificate (photocopy)
c A recommendation letter from your company/organization/ institution
d A recommendation letter from Chamber of Commerce& Industry
e Your Tax Payment Receipt for last year (photocopy)
f Your Character Certificate/Police Clearance Certificate