Employment Visa (Z Visa) is issued to an alien who comes to China for a post or employment, and his/her accompanying family members.

I.Please submit the following documents with your application:
1. A valid passport as well as a copy of its information page: Your valid passportmust have at least six (6) months of remaining validity with at least one blank visa page in it.
2. Application form: One completed Visa Application Form (Q1)
3. Photo: one recent photo of 2*2 square inch (black & white or color is acceptable) glued or stapled on the application form.
4.Temporary foreign visitors with a valid US visa or foreign residents with legitimate status in the US, may apply for Chinese visa to the Visa Office of the Chinese Embassy. The visa officer may ask the applicant to provide the original and photocopy of their US Green Card,Work Permit,I-20 Form, valid US Visa or other additional documents and make a decision on whether to issue the visa case by case.
5. First time applicants whose former nationality was Chinese, shall write down his Chinese name in the application form and submit his original Chinese passport and the photocopy of the information page of the passport. Applicant who was formerly Chinese and has acquired a new US passport, if there is a Chinese visa in the old passport, shall submit his old US passport or the photocopy of the Chinese visa.
6. A visa notification issued by the authorized Chinese unit.
7. An originial and a photocopy of the Work Permit for Aliens issued by the Chinese Labor Ministry or the original of Foreign Expert's License issued by the Chinese Foreign Expert Bureau.
8. A visa notification issued by the authorized Chinese unit or proof of kinship, e.g. marriage certificate, birth certificate, etc, is required for the accompanying family members.

Ⅱ.How to apply
1.You may submit the application to the Visa Office of the Embassy or Consulate -General which holds consular jurisdiction over the state where you reside;
2.If you cannot come in person, you may entrust someone else or a travel/visa agent to drop off your application at the visa office of the Embassy or Consulate -General which holds consular jurisdiction over the state where you reside.
▲No appointment is required.
▲Mailed applications are not acceptableand will be refused.

Ⅲ.Processing Time
1.The regular processing time is 4 working days.
2.Express service: 2-3 working days processing, $20 will be charged per visa.
3.Same day rush service: additional fees of $30 for 1 working day processing (applications presented before 12:30pm may be picked up between 2:30pm-3:00pm on the same day).

Ⅳ.Visa fees
1.Please pay by Visa, MasterCard, Money Order, Cashier's Check or Company Check. Cash or Personal checks are not acceptable.
2.Please make the company check, cashier's check or money order payable to Chinese Embassy.
3.Fees:$130 for American, and $30 for Citizens of other countries.

Ⅴ.Additional Information
1. If the visa application form is not filled out completely, correctly and legibly, this can cause a delay in processing or refusal of the requested visa.
2. ( Z ) visa is valid for one entry, three months. The holder of a (Z) visa shall go through residential formalities in the local public security department within thirty days of entry into China.
3. Visa Officers may require some other relevant documents.
4.Any person suffering from a mental disorder, leprosy, AIDS, venereal diseases, contagious tuberculosis or other such infectious diseases shall not be permitted to enter China.

All regulations are subject to change without notice.

Source: http://www.china-embassy.org/eng/hzqz/zgqz/t84245.htm