[Zope] How to support Chinese Characters in ZMI?

[Lian Liming]

Hi,
    I find that the ZMI doesn't support Chinese very well. I type some
chinese characters in the ZMI, and after "save change",  the
characters didn't display well.
    The default charset for ZMI is "ISO-8859" which doesn't support Chinese.
     I want to change it to "UTF-8" to support Chinese.
     My zope version is 2.6.4 and i don't want to upgrade to 2.7.  Is
there some way to solve the problem in v2.6?
      Thanks in advance!