Chinese text on website from Yahoo

OK, here’s a stupid question from a web novice:

You buy a cheap domain name at Yahoo, then you write a temporary text to appear to the site’s visitors.

The problem is, the English text looks good, but the Chinese - even though it looked right when I typed it in on my Taiwanese laptop - appears as gibberish like this: #485897557 %4545470

What did I do wrong? How can I change that?

Did you set the character encoding to utf-8?

Hoy, thanks, Taffy.
Of course I didn’t.