How to see Chinese data using SQL Plus?

Hi,
Is it possible to see the Chinese character string saved in the database by using English version Sql Plus? The following data is set up in the table NLS_DATABASE_PARAMETERS in my oracle database. I'm really appreciated if anybody could help me.
Thanks,
Suwei Ma
[email protected]
PARAMETER VALUE
NLS_LANGUAGE AMERICAN
NLS_TERRITORY AMERICA
NLS_CURRENCY $
NLS_ISO_CURRENCY AMERICA
NLS_NUMERIC_CHARACTERS .,
NLS_CHARACTERSET UTF8
NLS_CALENDAR GREGORIAN
NLS_DATE_FORMAT DD-MON-RR
NLS_DATE_LANGUAGE AMERICAN
NLS_SORT BINARY
NLS_TIME_FORMAT HH.MI.SSXFF AM
PARAMETER VALUE
NLS_TIMESTAMP_FORMAT DD-MON-RR HH.MI.SSXFF AM
NLS_TIME_TZ_FORMAT HH.MI.SSXFF AM TZH:TZM
NLS_TIMESTAMP_TZ_FORMAT DD-MON-RR HH.MI.SSXFF AM TZH:TZM
NLS_DUAL_CURRENCY $
NLS_COMP BINARY
NLS_NCHAR_CHARACTERSET UTF8
NLS_RDBMS_VERSION 8.1.7.4.1

Thanks for your repley. I don't think I need to change NLS_CHARACTERSET setup because I can load Chinese data into the database and also can see the data by running Chinese tool like NJStar Communicator. Therefore, I probably need to change the session level parameters, but not sure.

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