envelope-o" aria-hidden="true"></i></a> {% endif %} {% if site.weibo_username %}
            <a href="http://weibo.com/{{site.weibo_username}}" title="Weibo"><i class="fa fa-weibo" aria-hidden="true"></i></a> {% endif %} {% if site.zhihu_username %}
            <a href="https://www.zhihu.com/people/{{site.zhihu_username}}" title="Zhihu"><i class="iconfont icon-daoruzhihu"></i></a> {% endif %} {% if site.twitter_username %}
            <a href="https://twitter.com/{{site.twitter_username}}" title="Twitter"><