You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <links plcontinue="1|0|大模型系统教学实践平台操作指南" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Main Page">
        <links>
          <pl ns="0" title="Alluxio User Guide" />
          <pl ns="0" title="Documentations" />
          <pl ns="0" title="GPU-Cluster(Docker)3.0 User Guide" />
          <pl ns="0" title="HowToEditWikiPages" />
          <pl ns="0" title="Instructor of Booting Alluxio" />
          <pl ns="0" title="K8S User Guide" />
          <pl ns="0" title="OpenStack User Guide" />
          <pl ns="0" title="Projects" />
          <pl ns="0" title="SharedBooks" />
          <pl ns="0" title="VPN User Guide" />
        </links>
      </page>
    </pages>
  </query>
</api>