Just today

https://timesofindia.indiatimes.com/education/news/mandarin-...

Mainland Chinese gov't claims to have 56 official ethnicities in their country. They are certainly celebrated by official media. In particular, they seem to love the southwest portion of the country (Guangxi and Yunnan) with many mountaineous regions and various ethnic groups, mostly because they do not protest the central gov't. Also, look at the coins and bills of yuan -- many different ethnicities.