This is a normal thing, mainly due to the following reasons:

1. The raw materials are different. Potato chips can be directly derived from potatoes or sweet potatoes. No matter where or whether the family is rich or not, you can actually eat potatoes or sweet potatoes, and you can plant them at will, and the output is very high. When you are poor, potatoes and sweet potatoes have always been the main economic sources, because they are really very convenient to grow and can be eaten raw. If you don't have land to grow, you can buy it at a very low price and anywhere, so they are coarse grains everywhere. Xianbei in China is actually made of rice. There are many places that don't produce or eat rice, and it is a very troublesome process to plant rice, then harvest it, dry it and peel it.

2. The manufacturing convenience is different. The process of making potato chips is very simple. Clean potatoes or sweet potatoes directly, then cut them into pancakes. You can directly fry them in an oil pan for two or three minutes, and you can eat them without adding any seasoning. They are very delicious, not only full, but also as snacks. However, the production method of Xianbei may be more complicated. The simplest one is to steam the rice, then flatten it, and then fry it in the oil pan. It looks simple, but only if you have rice and cook it first. If you want to make it more exquisite, and you have to squash the rice and bake it in the oven, it will be crispy and delicious.

3. Cultural effects brought by economic development. In the last century, China's economic development was very backward, and there was hardly any delicious food, and its culture was difficult to spread. However, the United States was very developed, and it could spread its delicious food through international education and movies. Coupled with international trade, this kind of potato chips with low cost and simple production could spread to other countries, with good sales, and occupied the main position of delicious food from now on.