Nanmian is a kind of Chinese noodle that is made from flour and is commonly eaten in several parts of China. Imagine playing with some flour when someone comes and asks you to make it into a long and thin noodle. That's what people do to make nanmian. They take some flour, mix it with water, and then roll and pull and stretch it until it becomes a long, thin noodle.
Nanmian can be made with different flours and in different shapes depending on the region where it is being made. Some nanmian noodles are long and straight, while others are curly or even spiral-shaped. When you eat nanmian, you can put it in some soup or stir-fry it with vegetables and meat. It can be served hot or cold, depending on how you like it.
Overall, nanmian is a delicious and versatile food that can be enjoyed in many different ways.