dbpower linked database is rather limited, especailly for chinese CD and the latest release, you could use this program - mp3tag (freeware) to amend your metadata. however it will load up all of your songs within the database before it allows you to amend. I will normally use a separare folder to store the CD which needs amendment.
mp3tag is only for edit the metadata. after you use the dbpower, if that CD does not appear with the correct metadata (such as name of song, album name, cd cover and so on), then you could the mp3tag to edit it - type in the correct info. hope this will help.