Recently, many friends have asked Naiba why, when submitting a website sitemap file to Baidu, it prompts „Index Type Not Processed“. Actually, this is because Baidu officially updated the Sitemap submission optimization process on July 8th, no longer supporting the submission of sitemap files where XML is nested within XML.
Cause of the Issue
The root cause of this issue is that Baidu modified the website sitemap submission method, no longer supporting index sitemap files.
On the afternoon of July 8th, the Baidu Search Resource Platform issued the "Sitemap Submission Method Optimization Announcement", stating that to improve the processing efficiency of sitemap files, the commonly used collection and dead link submission tools on the Search Resource Platform will no longer support index sitemap files (i.e., XML documents nested within XML documents).
as the free Let’s Encrypt SSL certificate nears expiration.
General Solution
From the cause, we know that index sitemap files in the format of XML nested within XML documents are no longer supported.
What is XML nested within XML?For example, some websites have a sitemap at sitemap.xml. Opening sitemap.xml reveals that it contains several other XML files. And
we only need to submit the final XML file that appears after opening the XML file, which contains the list of website article URLs.WordPress Solution
Taking WordPress as an example, almost all SiteMap plugins generate a main XML file, as shown in the image: https://blog.naibabiji.com/sitemap_index.xml. Opening it reveals several nested XML files below.

Therefore, we cannot add this main sitemap.xml file; instead, we need to individually submit these internal files, as shown in the image:

After doing this, it can be submitted normally to the Baidu backend.
Related articles:zBlog Solution
If you are using zblog, you can go to the Z-Blog Application Center to search for a sitemap plugin, install it, and then submit the corresponding sitemap address.

Other Website Sitemap Solutions
If you are using other programs that do not have built-in Sitemap functionality and there are no corresponding plugins available, you can use third-party websites to manually create sitemap files. You can find them by searching on Google or Baidu.

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