Here I am pasting some related info, hope this helps:
Contact Information
The Visa Information Call Center can be reached by dialing 4008-872-333 (toll free) or from within China or internationally by dialing 86-21-3881-4611 (local Shanghai number).
Available Services
Callers are be able to access information on all visa-types and application procedures for both immigrant and nonimmigrant visas
All nonimmigrant visa appointments for Mainland China are now made through the Visa Information Call Center.
Service is offered in Mandarin, Cantonese, English, the Fuzhou dialect and the Taishan dialect.
Hours
The Visa Information Call Center has pre-recorded visa information available 24 hours a day, 7 days a week. Live operators are available from 7 am to 7 pm, Monday through Friday and 8 am to 5 pm, Saturday.