unreal 5 how to import PBC file?

Thanks Dsharp,
yeap,i opened the RuleProcessor from window, but when i try to run to load the mapping which inclued the default pbc files , it shows nothing. I double checked the pbc files, it’s fine . So this confuses me . Do you make it works?
By the way , i tried another solution which is load the cell from world partition , it shows the baked elements actor , but when i load the Mapping(buildings, parks or cars PBC), it takes longer time to process, then the actor which i loaded before disappear. It’s weird. Could you give me a hand ? Thanks