1. Download and install the "Hefei Tong" APP, select "More Services" on the APP page, enter the "Convenience Services" page, click "Vaccination Certificate Inquiry", and enter the information of children and parents for inquiry.
2. Select "Hefei City" in the upper left corner of the Know-it-all APP, click "Vaccination Query" on the "Convenience Service" page, and enter the information of children and parents for inquiry.
The above query methods can be used for reference, and the specific operation steps may be different according to the actual operation process. It is recommended to consult relevant institutions to obtain the latest and most accurate information.