How do I store Chinese characters on an as400 database file.

I need to store a product code in English & a product description in Chinese on an AS400 database file.
I have the data on a spreadsheet & need to upload it to the AS400
I've created a physical file with a field defined with a data type of E (see below).
 

     A          R ITMTSTR                                              
     A                                      TEXT('TEST ITEM FILE')     
     A            ITPROD        20          TEXT('ENGLISH PRODUCT CODE')
     A            ITCDES        80E         TEXT('CHINESE DESCRIPTION')
     A          K ITPROD                                               

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I inserted a row using iSeries navigator & copy & pasted the data from the first line of the spreadsheet
The Chinese characters show up as squares in the row & when I try and save it I get an error
"Column 2: CWBNL0107 - Converted 4 bytes, 2 errors found beginning at offset 0"

Does anyone know what I need to do to get the Chinese characters onto my AS400 data file.