2. You can go directly to the public security organ of your place of residence to inquire.
3. Call the prison administration in the corresponding area for telephone inquiry. If the inquiry channel does not provide relevant information, you can call the office phone of the local detention center or go to the site for consultation, but you need to pay attention to respecting the work order and regulations of the detention center staff and not to interfere or harass them.
4. Online inquiry. Enter the local detention center official website or WeChat official account and other inquiry channels. Contact information and information disclosure guidelines of general detention centers can be found on relevant government websites.