Is the rich area in Mumbai, India good?

The rich area in Mumbai, India is very good, not inferior to the public infrastructure in Europe and America, but living in Mumbai is not a pleasant thing. Mumbai has a small population, the population density is more than ten times that of Shanghai, the public transportation facilities are chaotic, and the roads are not only narrow but also random. Mumbai is divided into the new city and the old city. The old city was built by the British, so the public facilities are ok, but the new city is a mess. Even if you live in a third-and fourth-tier city in China, you will feel that your hometown is paradise when you go to Mumbai, provided that you don't stay in luxury hotels all the time, but often go out for a walk.