How to enter our language in the Admin Note field

In the Admin Note, I try to put in the message in this field so it can be displayed on the checkout. When I enter our language (Chinese traditional) in {customer_display_text: message}, it cannot be shown correctly.  The message only shows ??.  How to correct it?

Hi,

It works for me when I test it locally:



If you edit the coupon in admin, do you see the characters correctly?  If not, my guess is the database column is not using utf8.

Looking through phpmyadmin, look at this:
  table: #__awocoupon
  column: note

Is the collation set to utf8?

You are right. I follow your instructions and it works fine.  Thanks for your help.