To shortly answer your question, an ethic community is a community of people who relate to each other in terms of culture, traditions, and overall ethnicities. An example of an ethnic community (I am speaking on myself) would be Juneteenth. In no way do I mean offense, it is just a mere example. If you need better understanding, let me know and I will gladly assist you.
China is closer to a pure command economy
The British rule in India had mixed blessings. Indians spoke hundreds of different languages, so the introduction of English by the British served to unified Indians with the same language.
Hope this helps!!!