Did you make the change in Settings/Reading? If so, just go back and change it to what it was.
Yes. I tried again by the browser and could not, appears only Asian characters
Does this mean you can’t login to change it? If so, then you may need to change it directly in the wp-options table in the database. Do you have access to, and know how to use, phpMyAdmin?
I tried again by the history of the Safari, appears only Asian characters
I believe I can do that. I have to make direct on the server?
Before you make any changes directly to your database, make a backup: http://codex.wordpress.org/Backing_Up_Your_Database
I believe figaro is correct; a direct change in the database may be required. If you can login to phpMyAdmin, or have command-line access to the MySQL database, you can try running this query:
UPDATE wp_options SET option_value='UTF-8' WHERE option_id='36'
option_id 36 is blog_charset, which is what you’re looking for. Good luck!
Figaro! Thanks a lot !!!! Works..
You’re welcome…glad you got it fixed.