Roon doesn’t have a folder browser. One of the design aims is to enable a user to browse a music library in an intuitive way by reference to Artist, Album, Work or Track, regardless of the underlying file structure or location.
Localisation is coming, but even without full localisation you can currently prefer your own metadata where you have Chinese file tags.
Select the albums that you wish to prefer (it can be easiest to extract them to a separate watched folder and then use Focus/Inspector/Location), using right click (or long press) and Select All, then Edit, Prefer File.