How long can I stay after the Hungarian pink card expires?

Can't stay. After the Hungarian pink card expires, it means that the visa has expired. If you can't renew it within one month before the expiration, staying in Hungary after the expiration will be regarded as illegal detention and will be punished accordingly, so you can't stay in Hungary after the expiration. Within 30 days before the expiration of the Hungarian pink card, you can go to the immigration office to renew your residence card for the second year, that is, the pink card, and you don't need to go back to China to apply again.