about oracle CHARACTERSET quesiton .

 1,if i want to change oracle CHARACTERSET , i read this aticle

 "the "normal codepoint conversion" who needs the character to be known in the target characterset. Oracle will convert the source characterset codepoint of a character to the equivalent Unicode codepoint , look this Unicode codepoint up in the target characterset and then uses the found target character set codepoint as endresult."

what does this mean .

suggest our db WE8ISO8859P1 ,  i use dump check  :

SQL> select dump('你好',16) from dual;

   DUMP('你好',16)
   -------------------------
   Typ=96 Len=4: c4,e3,ba,c3

i want to change the db character  from WE8ISO8859P1 to UTF8,