importing Bills - character encoding

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the feature of importing Bills and invoices from csv files is a great
improvement for my little world as it enables other people then just me to
prepare such documents (which is a huge improvement in the workflow if you
are not only working just by yourself).
However being located in China (and therefore dealing with Chinese
characters at times) I face a big obstacle with this unfortunately. Chines
characters just won't encode right and only display as hieroglyphs after
importing.

It seems that (due to whatever reason) the importing engine is different
for Bills/Invoices then for importing transactions. While you can choose
and tweak character encoding in all directions for the transactions import
there is nothing of that kind when importing Bills/Invoices. Am I just not
getting something obvious here maybe? Has anybody solved that issue?

I tried to play a little with the character encoding while saving the csv
files in OpenOffice but that has only resulted in different hieroglyphs in
GC depending on the encoding chosen for the csv file