It is true that the development in China is very unbalanced, and habits of different groups of people varies a lot. There are also abundant number of tech products targeting each group of people. For example, Taobao has been very popular in large cities for many years, you'd think they've saturated online shopping market. A new startup Pinduoduo launched in 2015, targeting online shopping market in smaller cities and countrysides, managed to acquire hundreds of millions of users there, and they just filed for IPO a few days ago.
https://news.ycombinator.com/item?id=15675118
All of the $18B transaction was handled by Ant Financial.
Totally agree: once chosen by the Communist Party, a company is likely to enjoy state-sanctioned monopoly status. Not only will they have access to the entire population, the population may have no access to any other service provider in the same sector.