How to correctly show Chinese, Japanese, and Korea (CJK) files' name in the FTP remote pane?

Please choose your default server encoding by going to "Tools | Global Options | Connection | Server Encoding". For instance, Chinese country should choose GB18030 as their default server encoding. Individual FTP site's server encoding can be specified at "Sites | Site manager | Options | Server Encoding" to overwrite the global's default configuration.
For the quick viewer's default encoding, you can change this encoding at "Global Options | Operation | Viewer Encoding".