You need invitation letter (original or a photocopy/fax) from China for your business visa application. Other documents are the Original passport and a photocopy of its pages with personal information; Visa Application Form; An original letter from the applicant's employer. It should contain the applicant's name, nationality, occupation, purpose of the visit, the planned date of entry and financial conditions; A passport photo with white background and the photocopy of a valid residence permit in Saudi Arabia.