If you view the file in your browser you have to make sure it uses the correct encoding.
Where can it be checked?
Look in the "View" menu of your browser for something like encoding settings (differs a little between browsers).
What did you do, "nakohdo", to display the Chinese characters instead of the å? é?¤æ??票/ä¾µæ? sequence of characters? (Because I can really see them on my screen with the same web browser...)
The browser can normaly recognise the encoding of a HTML or XML file and display it correctly. The robots.txt file you mentioned in your first posting doesn't provide a mechanism for telling its encoding so the browser has to guess or take the defaul settings.
Try opening the robots.txt in your browser and change the encoding to UTF-8. You could also try downloading the file (right click, "Save target as...") and opening it with a Unicode capable text editior, e.g. Windows own Notepad.
See http://en.wikipedia.org/wiki/Character_encoding for further information.
hth Frank