The online record of COVID-19 vaccine has been deleted from the computer, which also shows that

Delays in recording and transmitting vaccination information or other errors.

You can make a request at the original inoculation point and ask them to correct the online information and issue a paper COVID-19 vaccination certificate for you.

Novel coronavirus inactivated vaccine is a biological product made by inactivating novel coronavirus by physical and chemical methods. The product is non-pathogenic, but retains the immunogenicity of novel coronavirus. Protective antibodies can be produced after inoculation, which can effectively prevent novel coronavirus infection.