Mr.Anjum Saeed, you can write your email when your post your questions here, then you can receive my answers in your email. You want to apply for the visa for business (F visa) You should submit:
(I) Original Visa Notice Sheet from an authorized governmental apparatus /organization inChina prescribing the visa validity, number of entries and stay period;
(II) Fully completed Visa Application Form in Chinese or English, attached with one of the applicant's recent color photograph (30mm X 40mm)
(III) Original passport with validity more than six months and minimum 2 blank visa pages
(IV) Photocopy of the first 2 pages (personal information) of the passport and the recent Chinese visa page if there is any;
(V) Invitation letter from the company/organization/institution you want to visit in China