Business visa requirements for US citizen

Hi, Anwar, the requirements are as following:
1. Actual passport of more than six months validity with a blank visa page.
2. One complete application form (The People's Republic of China Visa Application Form) with one recent passport size photograph (black and white or color).
3. An official invitation from related Chinese government departments or companies / organizations authorized by Chinese Ministry of Foreign Affairs to issue visa is required. Based on the official invitation with a company letter which should be attested by chamber of commerce, you can apply for a single, a double entry, or a multiple entry visa.
4. Your residence permit in Saudi Arabia.
5. Proof of your economic status;
6. Other requiremnts repuired by the officials.

Express/Special Express is available only with the approval of the consular official and additional rush service fees for 70/100 Saudi Riyals will be charged. The processing time of expedited service is three working days.

Thanks very much for your comprehensive, descriptive reply.