After I donated blood at school (Dalian), the blood center didn't reply to me. I know how to ask first.

The first thing to say is that you can't find the blood information you want, because after the first blood test, you only have a number when you enter the blood station for re-examination, and there is no personal information to follow. Unless you have the pathogen of a major infectious disease in your blood, you will be contacted actively. Secondly, under normal circumstances, except blood donation card, the blood center has no reply to blood donors.