To prove innocence, you can follow the following steps: 1. Prepare the required materials: valid identity documents (such as ID card and passport), photos (one or more photos may be needed) and application forms (which can be collected at the police station or relevant institutions). 2. Go to the police station: bring the required materials to the accreditation section of the police station and wait in line according to the personnel guidelines. 3. Submission and payment: provide the required materials in the window, submit the application form and pay the relevant fees (the fees may vary according to local regulations). 4. Waiting for processing: Usually, the processing time without criminal certificate ranges from several working days to two weeks, and the specific time may vary due to factors such as the number of personnel and material review. 5. Get a certificate: Once the application is approved and processed, you will receive a certificate of innocence. Please note that the above steps are for reference only, and the specific requirements may vary according to the policies and processes in different regions. It is recommended that you consult the local authorities or take the official announcement as the standard before the specific operation.