After I set my database using NLS_NCHAR_CHARACTERSET = UTF16, chinese character can be inserted successfully. However, chinese character cannot be display correctly in SQL PLUS using simple SQL select statement. (I'm using Windows 2000 Professional - English edition)
I have already try to set the registry value for NLS_LANG to AMERICAN_AMERICA.UTF8, AMERICAN_AMERICA.ZHT16MSWIN950, AMERICAN_AMERICA.ZHT16BIG5, TRADITIONAL CHINESE_TAIWAN.UTF8, TRADITIONAL CHINESE_TAIWAN.ZHT16MSWIN950, TRADITIONAL CHINESE_TAIWAN.ZHT16BIG5. However, none of them can solve the problem.