How to use pinia outsideof a project

[XiaoDan12202]

There are two projects named ProjectA and ProjectB.I created pinia in ProjectA where there is useTestStore. I refrerenced ProjectA which exports pinia and useTestStore in ProjectB.I called useTestStore() in projectB,there is no error repoted but the values in the store are initial values, it seems not the store in ProejectA but a new store.How can I use store in another project?