* lisp/language/china-util.el (decode-hz-region): Pay attention to "~~}" sequence at the end of Chinese character range. (hz-category-table): New variable. (encode-hz-region): Convert non-encodable characters to \u... and \U... Preserve ESC on ecoding. Put `chinese-gb2312' `charset' text property in advance to force iso-2022-encoding to select chinese-gb2312 designation.