Did you have a look at the concrete violations? The font you are using doesn't matter as long as the encoding it set correctly (use UTF-8 if possible).
<!-- <option name="short name of first option (like in the dialog)">description of first option</option> -->
<!-- <option name="short name of second option (like in the dialog)">description of second option</option> -->
<!-- possibly more options that can also be grouped by tabs -->
</fullDescription>
<ports>
<inPort index="0" name="参数导入">获取上个节点传过来的参数</inPort>
<!-- possibly more input ports here-->
</ports>
<views>
<!-- <view index="0" name="name of first view">Description of first view...</view> -->
<!-- <view index="1" name="name of second view">Description of second view...</view> -->
</views>
</knimeNode>