a unicode question?

[zdwang at xinces.com]

Hello,
   There is a unicode string, I want to change it to ansi string. but
it raise an exception.
   Could you help me?

##  I want to change s1 to s2.

   s1 = u'\xd6\xd0\xb9\xfa\xca\xaf\xbb\xaf(600028) '
   
   s2 = '\xd6\xd0\xb9\xfa\xca\xaf\xbb\xaf(600028) '