The Chinese language may be hard to learn but over a billion people speak it daily. Those billion people are not one single group or ethnicity.
There are over 50 ethnic minorities in China. The 8% of the Chinese population that aren't Han have their own distinct culture and traditions. The Chinese Cultural Center of San Francisco has some details into what makes up an ethnic minority.
The ethnic minorities are part of a recent photo essay or family portrait. If you want a few more details on each of them Paul Noll's Chinese Nationalities and Their Populations is a good starting place.