Give a small realistic example:
A factory moved to a remote town and recruited inspection workers there.
Around this factory, it will gradually promote the affiliated tertiary industry such as laundry, breakfast shop, restaurant, hospital and clothing store.
The benefits of the factory are good-the workers who work in the factory and get paid are not satisfied with eating in the canteen, but often go to various small restaurants nearby to eat and drink collectively, which will gradually promote the development of the tertiary industry in this area.
The efficiency of the factory is not good-the wages of workers in the factory are not enough to support their extra consumption, so they will gradually reduce the number of times they eat out. Many restaurants that have passed the boom period are slowly closing down because of the decrease in passenger flow, and other industries around them will slowly decline.
Get the whole picture from small details
What is the economic development of a region?
Just look at the number of local restaurants.
-my humble opinion, don't spray if you don't like it.