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>
    <recentchanges rccontinue="2018-01-23T05:53:10Z|10157" />
  </query-continue>
  <query>
    <recentchanges>
      <rc type="log" ns="6" title="File:Longcat.pdf" rcid="10167" pageid="5098" revid="0" old_revid="0" timestamp="2020-08-29T09:22:35Z" />
      <rc type="log" ns="6" title="File:Longcat.pdf" rcid="10166" pageid="5098" revid="0" old_revid="0" timestamp="2020-08-28T08:28:55Z" />
      <rc type="edit" ns="0" title="我们的游戏" rcid="10165" pageid="50" revid="9516" old_revid="9515" timestamp="2020-02-18T09:22:42Z" />
      <rc type="edit" ns="0" title="我们的游戏" rcid="10164" pageid="50" revid="9515" old_revid="8146" timestamp="2020-02-18T09:18:11Z" />
      <rc type="new" ns="0" title="CODE.ORG课程" rcid="10163" pageid="5097" revid="9514" old_revid="0" timestamp="2018-01-30T07:21:05Z" />
      <rc type="new" ns="0" title="我们的故事书教材优化" rcid="10162" pageid="5096" revid="9513" old_revid="0" timestamp="2018-01-30T07:17:11Z" />
      <rc type="edit" ns="0" title="联系我们" rcid="10161" pageid="1692" revid="9512" old_revid="9511" timestamp="2018-01-23T06:11:02Z" />
      <rc type="edit" ns="0" title="联系我们" rcid="10160" pageid="1692" revid="9511" old_revid="9510" timestamp="2018-01-23T06:10:33Z" />
      <rc type="edit" ns="0" title="联系我们" rcid="10159" pageid="1692" revid="9510" old_revid="9509" timestamp="2018-01-23T06:09:13Z" />
      <rc type="edit" ns="0" title="联系我们" rcid="10158" pageid="1692" revid="9509" old_revid="9508" timestamp="2018-01-23T05:53:30Z" />
    </recentchanges>
  </query>
</api>