在rss feed中显示链接数据的描述

Question

在我的RSS feed中的描述字段上，我想显示来自源的数据

    <?xml version="1.0" encoding="utf-8"?>
<rss version="2.0">
  <channel>
    <generator>rtvd.ro</generator>
    <title>Curs Valutar</title>
    <link>http://www.rtvd.ro</link>
    <description />
    <language>en-us</language>
    <item>
      <title>Curs GBP</title>
      <pubDate>Mon, 30 Mar 2020 13:55:44 +0300</pubDate>
      <link>http://infovalutar.ro/bnr/azi/gbp</link>
      <guid isPermaLink="true">http://infovalutar.ro/bnr/azi/gbp</guid>
      <description><![CDATA[http://infovalutar.ro/bnr/azi/gbp]]></description>
    </item>
    <item>
      <title>Curs Euro</title>
      <pubDate>Mon, 30 Mar 2020 13:53:02 +0300</pubDate>
      <link>http://infovalutar.ro/bnr/azi/eur</link>
      <guid isPermaLink="true">http://www.infovalutar.ro/bnr/2020/3/30/eur</guid>
      <enclosure url="http://www.infovalutar.ro/bnr/2020/3/30/eur" length="" type="" />
      <description><![CDATA[http://infovalutar.ro/bnr/azi/eur]]></description>
    </item>
    <item>
      <title>Curs Dolar</title>
      <pubDate>Mon, 30 Mar 2020 13:54:26 +0300</pubDate>
      <link>http://infovalutar.ro/bnr/azi/usd</link>
      <description><![CDATA[http://infovalutar.ro/bnr/azi/usd]]></description>
    </item>
  </channel>
</rss>

如果您遵循http://infovalutar.ro/bnr/azi/usd，则会显示此值4.3637

所以基本上我想在描述中显示该值4.3637