The People's Republic of China has 6 diplomatic representations in USA to cover the vast country's jurisdictions. These representations are:

Mainland China provides a plenty of travel visa type. Below are detailed China visa requirements.
Chinese Tourist Visa Requirements:

Original passport with minimum validity of 6 months.
Signed Chinese visa application form. The application form must be filled online on the official website, please click the following link: China Visa Application Form.
One passport-type photo on glossy photo paper. Please check the Photo Requirements for Chinese Visa Applications.
Non-U.S. citizens must submit proof of legal stay or residence permit in USA.
Previous China visa copy (if applicable).
Round trip flight reservation.
Hotel booking or personal invitation letter.
If you are a former Chinese citizen you will be require to provide other supporting documents.
Minors will need to submit birth certificate.
Chinese visa fee will be paid when visa is issued.

Chinese Business Visa Requirements:

Original passport with minimum validity of 6 months.
Signed Chinese visa application form. The application form must be filled online on the official website, please click the following link: China Visa Application Form.
One passport-type photo on glossy photo paper. Please check the Photo Requirements for Chinese Visa Applications.
Non-U.S. citizens must submit proof of legal stay or residence permit in USA.
Previous China visa copy.
Documents on the commercial activity issued by your business partner in China, or trade fair invitation. Invitation letter copy is accepted.
More supporting documents might be required from former Chinese citizen.
Chinese visa fee is payable if visa is issued.