Mr. Dean, the Consular Districts of China Consulate in San Francisco are : Northern California, Nevada, Oregon, Washington, and Alaska, if you don't reside in these states, you can't apply for authentication of marriage license.

I think you need to do it through China consulate in Los Angeles, the whole process is that:
1. have the marriage certificate certified by the Secretary of the State (Lieutenant Governor of Hawaii, of Guam and of America Samoa, Attorney General of the Commonwealth of Northern Mariana Islands) of the relevant state in which the document is executed. (Office of the secretary of state of California in Los Angeles: 300 south Spring Street, Room 12513 Los Angeles, CA 90013-1233, Tel: 213-8973062)

2. Have it authenticated by the Chinese Consulate General in Los Angeles.

The application by mailing is not accepted, you need to entrust someone else to do it for you.