The object link relationship between CDB and PDBs

I'm interested in how the object link working between CDB and its' PDBs, i do the following test:

Abstract of the testing:
When i query an oracle supplied table such as SYS.AUDIT_ACTIONS ON pdb, since it is object linked to the CDB, so the result is returned from the SYS.AUDIT_ACTIONS table on CDB. Then i rename the SYS.AUDIT_ACTIONS table on CDB$ROOT to another on and also rename its' public synonym to another name, and i query again from the pdb "select * from sys.audit_actions" to see whether some non-exist error  will returns.