After the cancellation of the hospital health card, can I use this card to check letters again?

I can't. Hospital health card is a convenient service launched by government departments and hospitals. After cancellation, the hospital will clear all personal information related to the card and cannot check the information, including medical records. You only need a health card to go to the hospital, and you don't have to queue up, so you can avoid taking paper medical records, registering by credit card, paying fees and printing results.