private function EncodeUtf8(str : String):String
        {
            var oriByteArr : ByteArray = new ByteArray();
            oriByteArr.writeUTFBytes(str);
            var tempByteArr : ByteArray = new ByteArray();
            for (var i:int = 0; i<oriByteArr.length; i++) {

                 if (oriByteArr[i] == 194) {
                      tempByteArr.writeByte(oriByteArr[i+1]);
                      i++;
                } else if (oriByteArr[i] == 195) {
                    tempByteArr.writeByte(oriByteArr[i+1] + 64);
                    i++;
                } else {
                    tempByteArr.writeByte(oriByteArr[i]);
                  }

             }

             tempByteArr.position = 0;
             return tempByteArr.readMultiByte(tempByteArr.bytesAvailable,"chinese");
        }