Why are there not many convenience stores in Nanjing?

Why are there not many convenience stores in Nanjing? Many times it depends on the development of the city's business district, or the geographical location may not be so good. In Nanjing, the location of convenience stores should be based on their own economic ability and what business circle they want to open. The location of convenience stores should be close to main streets, intersections, bus stops, stations, office buildings, residential areas, hotels and some large brand stores, such as KFC, Golden Arch and Kungfu. If I want to go straight into those big shopping malls, it's not very recommended. I can do a business survey and compare it. The rent in the mall is more expensive than outside, and the flow of people can only be driven by the mall. Status is relatively passive. If the mall is not well run and there are few people, the convenience store business opened by everyone is basically not much better.