What is the deepest nesting of autonomous areas within other autonomous areas in China? Are there areas that are three deep? Deeper?

On my upcoming trip to China one place on my list to visit is Qapqal Xibe Autonomous County.

This Xibe people are related to the Manchu people. The Manchu were rulers of China during the Qing dynasty after having successfully invaded and taken over. But they completely assimilated into Chinese culture and their language is now all but extinct. The Xibe people however maintain their traditional language. Some Chinese of Manchu descent who are interested in their roots have been going to Qapqal to learn the lost language of their ancestors.

Interestingly, the Xibe area is entirely within the borders of the Ili Kazakh Autonomous Prefecture. The Kazakhs are another recognized ethnic minority of China.

Besides autonomous counties and prefectures there are also autonomous regions and banners where various ethnic minorities are given some degree of autonomy, hence the naming.

Such areas typically have rules such as that all signs must be bilingual in Chinese and the local traditional language. Pretty interesting if you're into languages, writing systems, anthropology, ethnic minorities, etc.

So this has got me wondering if there is anywhere in China one or more three-level-deep autonomous area(s)?

That is to say an official area where a recognized ethnic minority is surrounded by a larger official area where another recognized ethnic minority is once more surrounded by an even larger official area having a third recognized ethnic minority.

Where is the deepest level of nesting in all of such ethnic minority autonomous areas in China?