How can we portrait middle-class cluster in Shanghai?

The number of Animal Healthcare Institutions and Public Parks in Shanghai has

massively increased from 2016 to 2020. The denser they are, the higher the housing

rent. Therefore, there exist limitations if we merely use housing prices to define

the middle-class group.

As shown in the data analysis, middle-class people live at a high expense accompanied

by their pets. They pursue high life quality and care about the surrounding

distribution of animal healthcare centers and public parks.