Did you get a security certificate in Nanning when you were a minor offender?

You can't. According to the provisions of Article 17 of the Regulations on the Administration of Security Services, under any of the following circumstances, a person shall not serve as a security guard, and has been detained for more than three times for education, compulsory isolation and detoxification, reeducation through labor or administrative detention. Having received criminal punishment for intentional crime. Therefore, the law of juvenile offenders can't take the security certificate in Nanning.