If try to create a link to a search result in AniDex using non-ASCII characters it breaks. Example:
https://anidex.info/?q=妖少 gives you no results but it fills out the search text correctly. All you need to do is click the magnifying glass and it works fine and returns results.
If you do a simple search for example "妖少" it returns results but if you refresh the page it returns no torrents.