First of all, it is not northerners who like to eat chicken, but southerners who like to eat duck, just as you can't say that Ethiopians like to starve. The key is whether you can eat it. Then the question becomes, why are there more chickens and fewer ducks in the recipes in the north and more ducks in the recipes in the south? We all know that ducks eat fish upstream of the water. In the south, especially in the middle and lower reaches of the Yangtze River, there are many rivers and lakes and many natural ducks. Coupled with logistics costs, ducks have been rare in the menu in the north for thousands of years, but they are common in the south.