There are phone numbers listed below the website there, give them a call.
Or, to copy you posted question here paste to their email body: Email: chinaembassy_us@fmprc.gov.cn.
Last, you can contact the Immigration DPT here, and US Custom Service, I am sure there are some toll-free# listed.
Let me know if you want me to get that for as well. :-)
Gool luck!