Hi, this is to report a minor error: "Official ethnic language of the Narua nationality": correct to: "Naxi nationality".
Further detail: "Narua" is a term coined by linguists to refer specifically to the language. It is not used as a designation of the people. There is no such thing as a "Narua nationality".
The "nationality" defined in China is: "Naxi" (纳西).
(There is not a perfect match between linguistic situation and division into official ethnic groups, but overall for "Naxi" and "Naxi language", NXQ, the fit is not as bad as for other groups. Speakers of "Narua", NRU, are a much more difficult case, as they are placed in different "nationalities" in different areas.)