Cats and mankind have been residing in harmony for many years but that has not always been the situation. There have been times when cats have been practically destroyed in the name of God. And what occurred the Black Loss of life reigned supreme for a lot longer than it will. So we will go back to the origins of recorded background to the time of the pharaohs of Egypt. Here cats were revered as Gods and many were mummified to previous for eternity. Because the cats guarded the grain warehouses and killed the rats and mice that fed on the grain. Therefore minimizing famines, which were the curse of Egypt. It was illegal to eliminate cats in those days, like cows in India today.
I believe one of the reason why there were not many cats around is because they used to consume them. And every now and then the restaurant cat catches would grab an feline they could find and take them back to the restaurant. I recall seeing cats in glass shows out leading of the restaurants. But somewhere between then and today they restricted eating pet cats. So cats are now not on the menu and now there are felines everywhere. Most of them began in someone's house and acquired thrown away, since many are extremely friendly. Also they may have this thing about stomach worms. And in those days China had not been as modern as now so abdomen worms would have been a problem. Fleas are not a really problem because they have tile floor surfaces and wooden furniture.