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I have a workaround:
什麽是Unicode(統一碼/標準萬國碼)? in Trad'l Chinese
什么是Unicode(统一码)? in Simplified
Chinese
ユニコードとは何か?in Japanese
If you replace the Unihan characters with HTML entities representing those characters, they go through the filter (as of this writing). That is, replace 何 with &...