Your question is a bit vague, is the forign citizen Chinese? Are you interviewing for the visa at the Guangzhou consulate?
Your profile lacks details like Foreign Country. Your timeline doesn't help either.

Yours:
http://www.visajourney.com/timeline/profile.php?id=30143You go to the public safety office where you live to get this, when in China you need to register at the local public safety office where you are living. The certificate is in Chinese, the police office may provide and english translation, if not the Notary office in the same jurisdiction can do the translations.
QUOTE
POLICE RECORD
Generally available, reliable. Persons should apply for a certificate of no criminal record at the local Public Security Bureau (PSB) (or certain types of employers such as state owned enterprises), then make application to the notary office for a certificate based on the PSB document. Persons without a criminal record will be able to obtain a certificate to that effect. Certificates for individuals with one or more criminal convictions will list all convictions for which records still exist. The certificates purport to reflect all criminal convictions during residence in China.
http://travel.state.gov/visa/reciprocity/C...der/C/China.htmNote: If you are getting visa from the Guangzhou consulate, you will want to join A Candle for Love, that site covers in great detail what to expect from and how to plan for the interview process through that particular consulate.
http://candleforlove.com