I think China should be one of the most diversified countries in the world. There are 56 nationalities in China in terms of different cultures and historical roots, and each one has their own local dialect. Han is the majority group, which accounts for 92% out of the total population. So you will probably meet Han people if you go to most of the cities in China. The minority groups mostly live in the west and southwest of China, and they will have their own festivals, costume, food habits, and even beliefs. The language also differs based on different areas in which people are living, so there is no exact number of how many languages are spoken. So it is very common that when you go to another city, you can't understand their language. I think being culturally diversified and being international is happening at the same time. So every group is not isolated, since everyone can be connected through speaking Mandarin and the respect for each other's cultures.